qrhigles2.cpp 71 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt RHI module
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qrhigles2_p.h"
#include <QWindow>
#include <QOffscreenSurface>
#include <QOpenGLContext>
#include <qmath.h>

QT_BEGIN_NAMESPACE

/*
  OpenGL ES 2.0 + GLSL 100/120 backend. Binding vertex attribute locations and
  decomposing uniform buffers into uniforms (as expected by the GLSL 1xx shader
  generated by SPIRV-Cross) are handled transparently to the application via
  the reflection data (QShaderDescription). Textures and buffers feature no
  special logic, it's all just glTexSubImage2D and glBufferSubData (with
  "dynamic" buffers set to GL_DYNAMIC_DRAW). The swapchain and the associated
  renderbuffer for depth-stencil will be dummies since we have no control over
  the underlying buffers here. It is up to the application to create the
  context and window with the appropriate QSurfaceFormat when it comes to
  depth/stencil and MSAA.
*/

QRhiGles2::QRhiGles2(QRhiInitParams *params)
59
    : ofr(this)
60 61 62 63 64 65 66 67 68 69 70 71 72 73
{
    QRhiGles2InitParams *glparams = static_cast<QRhiGles2InitParams *>(params);
    ctx = glparams->context;
    maybeWindow = glparams->window; // may be null
    fallbackSurface = glparams->fallbackSurface;

    create();
}

QRhiGles2::~QRhiGles2()
{
    destroy();
}

74
bool QRhiGles2::ensureContext(QSurface *surface) const
75 76 77 78 79 80 81 82 83 84 85 86 87
{
    bool nativeWindowGone = false;
    if (surface && surface->surfaceClass() == QSurface::Window && !surface->surfaceHandle()) {
        surface = fallbackSurface;
        nativeWindowGone = true;
    }

    if (!surface)
        surface = fallbackSurface;

    if (buffersSwapped)
        buffersSwapped = false;
    else if (!nativeWindowGone && QOpenGLContext::currentContext() == ctx && (surface == fallbackSurface || ctx->surface() == surface))
88
        return true;
89

90
    if (!ctx->makeCurrent(surface)) {
91
        qWarning("QRhiGles2: Failed to make context current. Expect bad things to happen.");
92 93 94 95
        return false;
    }

    return true;
96 97 98 99 100 101 102
}

void QRhiGles2::create()
{
    Q_ASSERT(ctx);
    Q_ASSERT(fallbackSurface);

103 104
    if (!ensureContext(maybeWindow ? maybeWindow : fallbackSurface)) // see 'window' discussion in QRhiGles2InitParams comments
        return;
105 106 107 108 109 110 111 112

    f = ctx->functions();

    const char *vendor = reinterpret_cast<const char *>(f->glGetString(GL_VENDOR));
    const char *renderer = reinterpret_cast<const char *>(f->glGetString(GL_RENDERER));
    const char *version = reinterpret_cast<const char *>(f->glGetString(GL_VERSION));
    if (vendor && renderer && version)
        qDebug("OpenGL VENDOR: %s RENDERER: %s VERSION: %s", vendor, renderer, version);
113 114 115 116 117 118

    GLint n = 0;
    f->glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &n);
    supportedCompressedFormats.resize(n);
    if (n > 0)
        f->glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, supportedCompressedFormats.data());
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192
}

void QRhiGles2::destroy()
{
    if (!f)
        return;

    ensureContext();
    executeDeferredReleases();

    f = nullptr;
}

// Strictly speaking this is not necessary since we could do the deletes in
// release(). However, it is kind of nice that no release() ever requires a
// current context and so GL calls are isolated to specific places (build,
// beginFrame, endFrame) as much as possible.
void QRhiGles2::executeDeferredReleases()
{
    for (int i = releaseQueue.count() - 1; i >= 0; --i) {
        const QRhiGles2::DeferredReleaseEntry &e(releaseQueue[i]);
        switch (e.type) {
        case QRhiGles2::DeferredReleaseEntry::Buffer:
            f->glDeleteBuffers(1, &e.buffer.buffer);
            break;
        case QRhiGles2::DeferredReleaseEntry::Pipeline:
            f->glDeleteProgram(e.pipeline.program);
            break;
        case QRhiGles2::DeferredReleaseEntry::Texture:
            f->glDeleteTextures(1, &e.texture.texture);
            break;
        case QRhiGles2::DeferredReleaseEntry::RenderBuffer:
            f->glDeleteRenderbuffers(1, &e.renderbuffer.renderbuffer);
            break;
        case QRhiGles2::DeferredReleaseEntry::TextureRenderTarget:
            f->glDeleteFramebuffers(1, &e.textureRenderTarget.framebuffer);
            break;
        default:
            break;
        }
        releaseQueue.removeAt(i);
    }
}

QVector<int> QRhiGles2::supportedSampleCounts() const
{
    return { 1 };
}

QRhiSwapChain *QRhiGles2::createSwapChain()
{
    return new QGles2SwapChain(this);
}

QRhiBuffer *QRhiGles2::createBuffer(QRhiBuffer::Type type, QRhiBuffer::UsageFlags usage, int size)
{
    return new QGles2Buffer(this, type, usage, size);
}

int QRhiGles2::ubufAlignment() const
{
    return 256;
}

bool QRhiGles2::isYUpInFramebuffer() const
{
    return true;
}

QMatrix4x4 QRhiGles2::clipSpaceCorrMatrix() const
{
    return QMatrix4x4(); // identity
}

193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
static inline GLenum toGlCompressedTextureFormat(QRhiTexture::Format format, QRhiTexture::Flags flags)
{
    const bool srgb = flags.testFlag(QRhiTexture::sRGB);
    switch (format) {
    case QRhiTexture::BC1:
        return srgb ? 0x8C4C : 0x83F0;
    case QRhiTexture::BC3:
        return srgb ? 0x8C4E : 0x83F2;
    case QRhiTexture::BC5:
        return srgb ? 0x8C4F : 0x83F3;

    case QRhiTexture::ETC2_RGB8:
        return srgb ? 0x9275 : 0x9274;
    case QRhiTexture::ETC2_RGB8A1:
        return srgb ? 0x9277 : 0x9276;
    case QRhiTexture::ETC2_RGBA8:
        return srgb ? 0x9279 : 0x9278;

    case QRhiTexture::ASTC_4x4:
        return srgb ? 0x93D0 : 0x93B0;
    case QRhiTexture::ASTC_5x4:
        return srgb ? 0x93D1 : 0x93B1;
    case QRhiTexture::ASTC_5x5:
        return srgb ? 0x93D2 : 0x93B2;
    case QRhiTexture::ASTC_6x5:
        return srgb ? 0x93D3 : 0x93B3;
    case QRhiTexture::ASTC_6x6:
        return srgb ? 0x93D4 : 0x93B4;
    case QRhiTexture::ASTC_8x5:
        return srgb ? 0x93D5 : 0x93B5;
    case QRhiTexture::ASTC_8x6:
        return srgb ? 0x93D6 : 0x93B6;
    case QRhiTexture::ASTC_8x8:
        return srgb ? 0x93D7 : 0x93B7;
    case QRhiTexture::ASTC_10x5:
        return srgb ? 0x93D8 : 0x93B8;
    case QRhiTexture::ASTC_10x6:
        return srgb ? 0x93D9 : 0x93B9;
    case QRhiTexture::ASTC_10x8:
        return srgb ? 0x93DA : 0x93BA;
    case QRhiTexture::ASTC_10x10:
        return srgb ? 0x93DB : 0x93BB;
    case QRhiTexture::ASTC_12x10:
        return srgb ? 0x93DC : 0x93BC;
    case QRhiTexture::ASTC_12x12:
        return srgb ? 0x93DD : 0x93BD;

    default:
        return 0; // this is reachable, just return an invalid format
    }
}

245
bool QRhiGles2::isTextureFormatSupported(QRhiTexture::Format format, QRhiTexture::Flags flags) const
246
{
247 248
    if (isCompressedFormat(format))
        return supportedCompressedFormats.contains(toGlCompressedTextureFormat(format, flags));
249 250 251 252

    return true;
}

253
QRhiRenderBuffer *QRhiGles2::createRenderBuffer(QRhiRenderBuffer::Type type, const QSize &pixelSize,
Laszlo Agocs's avatar
Laszlo Agocs committed
254
                                                int sampleCount, QRhiRenderBuffer::Flags flags)
255
{
Laszlo Agocs's avatar
Laszlo Agocs committed
256
    return new QGles2RenderBuffer(this, type, pixelSize, sampleCount, flags);
257 258
}

Laszlo Agocs's avatar
Laszlo Agocs committed
259 260
QRhiTexture *QRhiGles2::createTexture(QRhiTexture::Format format, const QSize &pixelSize,
                                      int sampleCount, QRhiTexture::Flags flags)
261
{
Laszlo Agocs's avatar
Laszlo Agocs committed
262
    return new QGles2Texture(this, format, pixelSize, sampleCount, flags);
263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
}

QRhiSampler *QRhiGles2::createSampler(QRhiSampler::Filter magFilter, QRhiSampler::Filter minFilter,
                                      QRhiSampler::Filter mipmapMode,
                                      QRhiSampler::AddressMode u, QRhiSampler::AddressMode v, QRhiSampler::AddressMode w)
{
    return new QGles2Sampler(this, magFilter, minFilter, mipmapMode, u, v, w);
}

QRhiTextureRenderTarget *QRhiGles2::createTextureRenderTarget(const QRhiTextureRenderTargetDescription &desc,
                                                              QRhiTextureRenderTarget::Flags flags)
{
    return new QGles2TextureRenderTarget(this, desc, flags);
}

QRhiGraphicsPipeline *QRhiGles2::createGraphicsPipeline()
{
    return new QGles2GraphicsPipeline(this);
}

QRhiShaderResourceBindings *QRhiGles2::createShaderResourceBindings()
{
    return new QGles2ShaderResourceBindings(this);
}

void QRhiGles2::setGraphicsPipeline(QRhiCommandBuffer *cb, QRhiGraphicsPipeline *ps, QRhiShaderResourceBindings *srb)
{
    Q_ASSERT(inPass);

Laszlo Agocs's avatar
Laszlo Agocs committed
292
    QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, ps);
293
    if (!srb)
Laszlo Agocs's avatar
Laszlo Agocs committed
294
        srb = psD->m_shaderResourceBindings;
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316

    QGles2ShaderResourceBindings *srbD = QRHI_RES(QGles2ShaderResourceBindings, srb);
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);

    const bool pipelineChanged = cbD->currentPipeline != ps || cbD->currentPipelineGeneration != psD->generation;
    const bool srbChanged = cbD->currentSrb != srb || cbD->currentSrbGeneration != srbD->generation;

    if (pipelineChanged || srbChanged) {
        cbD->currentPipeline = ps;
        cbD->currentPipelineGeneration = psD->generation;
        cbD->currentSrb = srb;
        cbD->currentSrbGeneration = srbD->generation;

        QGles2CommandBuffer::Command cmd;
        cmd.cmd = QGles2CommandBuffer::Command::BindGraphicsPipeline;
        cmd.args.bindGraphicsPipeline.ps = ps;
        cmd.args.bindGraphicsPipeline.srb = srb;
        cmd.args.bindGraphicsPipeline.resOnlyChange = !pipelineChanged && srbChanged;
        cbD->commands.append(cmd);
    }
}

317 318
void QRhiGles2::setVertexInput(QRhiCommandBuffer *cb, int startBinding, const QVector<QRhiCommandBuffer::VertexInput> &bindings,
                               QRhiBuffer *indexBuf, quint32 indexOffset, QRhiCommandBuffer::IndexFormat indexFormat)
319 320 321 322 323 324 325 326
{
    Q_ASSERT(inPass);
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);

    for (int i = 0, ie = bindings.count(); i != ie; ++i) {
        QRhiBuffer *buf = bindings[i].first;
        quint32 ofs = bindings[i].second;
        QGles2Buffer *bufD = QRHI_RES(QGles2Buffer, buf);
Laszlo Agocs's avatar
Laszlo Agocs committed
327
        Q_ASSERT(bufD->m_usage.testFlag(QRhiBuffer::VertexBuffer));
328 329 330 331 332 333 334 335 336 337 338
        QGles2CommandBuffer::Command cmd;
        cmd.cmd = QGles2CommandBuffer::Command::BindVertexBuffer;
        cmd.args.bindVertexBuffer.ps = cbD->currentPipeline;
        cmd.args.bindVertexBuffer.buffer = bufD->buffer;
        cmd.args.bindVertexBuffer.offset = ofs;
        cmd.args.bindVertexBuffer.binding = startBinding + i;
        cbD->commands.append(cmd);
    }

    if (indexBuf) {
        QGles2Buffer *ibufD = QRHI_RES(QGles2Buffer, indexBuf);
Laszlo Agocs's avatar
Laszlo Agocs committed
339
        Q_ASSERT(ibufD->m_usage.testFlag(QRhiBuffer::IndexBuffer));
340 341 342 343
        QGles2CommandBuffer::Command cmd;
        cmd.cmd = QGles2CommandBuffer::Command::BindIndexBuffer;
        cmd.args.bindIndexBuffer.buffer = ibufD->buffer;
        cmd.args.bindIndexBuffer.offset = indexOffset;
344
        cmd.args.bindIndexBuffer.type = indexFormat == QRhiCommandBuffer::IndexUInt16 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT;
345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436
        cbD->commands.append(cmd);
    }
}

void QRhiGles2::setViewport(QRhiCommandBuffer *cb, const QRhiViewport &viewport)
{
    Q_ASSERT(inPass);
    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::Viewport;
    cmd.args.viewport.x = viewport.r.x();
    cmd.args.viewport.y = viewport.r.y();
    cmd.args.viewport.w = viewport.r.z();
    cmd.args.viewport.h = viewport.r.w();
    cmd.args.viewport.d0 = viewport.minDepth;
    cmd.args.viewport.d1 = viewport.maxDepth;
    QRHI_RES(QGles2CommandBuffer, cb)->commands.append(cmd);
}

void QRhiGles2::setScissor(QRhiCommandBuffer *cb, const QRhiScissor &scissor)
{
    Q_ASSERT(inPass);
    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::Scissor;
    cmd.args.scissor.x = scissor.r.x();
    cmd.args.scissor.y = scissor.r.y();
    cmd.args.scissor.w = scissor.r.z();
    cmd.args.scissor.h = scissor.r.w();
    QRHI_RES(QGles2CommandBuffer, cb)->commands.append(cmd);
}

void QRhiGles2::setBlendConstants(QRhiCommandBuffer *cb, const QVector4D &c)
{
    Q_ASSERT(inPass);
    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::BlendConstants;
    cmd.args.blendConstants.r = c.x();
    cmd.args.blendConstants.g = c.y();
    cmd.args.blendConstants.b = c.z();
    cmd.args.blendConstants.a = c.w();
    QRHI_RES(QGles2CommandBuffer, cb)->commands.append(cmd);
}

void QRhiGles2::setStencilRef(QRhiCommandBuffer *cb, quint32 refValue)
{
    Q_ASSERT(inPass);
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);

    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::StencilRef;
    cmd.args.stencilRef.ref = refValue;
    cmd.args.stencilRef.ps = cbD->currentPipeline;
    cbD->commands.append(cmd);
}

void QRhiGles2::draw(QRhiCommandBuffer *cb, quint32 vertexCount,
                     quint32 instanceCount, quint32 firstVertex, quint32 firstInstance)
{
    Q_ASSERT(inPass);
    Q_UNUSED(instanceCount); // no instancing
    Q_UNUSED(firstInstance);
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);

    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::Draw;
    cmd.args.draw.ps = cbD->currentPipeline;
    cmd.args.draw.vertexCount = vertexCount;
    cmd.args.draw.firstVertex = firstVertex;
    cbD->commands.append(cmd);
}

void QRhiGles2::drawIndexed(QRhiCommandBuffer *cb, quint32 indexCount,
                            quint32 instanceCount, quint32 firstIndex, qint32 vertexOffset, quint32 firstInstance)
{
    Q_ASSERT(inPass);
    Q_UNUSED(instanceCount); // no instancing
    Q_UNUSED(firstInstance);
    Q_UNUSED(vertexOffset); // no glDrawElementsBaseVertex
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);

    QGles2CommandBuffer::Command cmd;
    cmd.cmd = QGles2CommandBuffer::Command::DrawIndexed;
    cmd.args.drawIndexed.ps = cbD->currentPipeline;
    cmd.args.drawIndexed.indexCount = indexCount;
    cmd.args.drawIndexed.firstIndex = firstIndex;
    cbD->commands.append(cmd);
}

QRhi::FrameOpResult QRhiGles2::beginFrame(QRhiSwapChain *swapChain)
{
    Q_ASSERT(!inFrame);

    QGles2SwapChain *swapChainD = QRHI_RES(QGles2SwapChain, swapChain);
437 438 439
    if (!ensureContext(swapChainD->surface))
        return QRhi::FrameOpError;

440
    inFrame = true;
441
    currentSwapChain = swapChainD;
442 443 444 445 446 447 448 449 450 451

    executeDeferredReleases();
    QRHI_RES(QGles2CommandBuffer, &swapChainD->cb)->resetState();

    return QRhi::FrameOpSuccess;
}

QRhi::FrameOpResult QRhiGles2::endFrame(QRhiSwapChain *swapChain)
{
    Q_ASSERT(inFrame);
452
    inFrame = false;
453 454

    QGles2SwapChain *swapChainD = QRHI_RES(QGles2SwapChain, swapChain);
455 456 457
    if (!ensureContext(swapChainD->surface))
        return QRhi::FrameOpError;

458 459
    executeCommandBuffer(&swapChainD->cb);

460
    currentSwapChain = nullptr;
461 462 463 464 465 466 467 468 469 470
    ++finishedFrameCount;

    if (swapChainD->surface) {
        ctx->swapBuffers(swapChainD->surface);
        buffersSwapped = true;
    }

    return QRhi::FrameOpSuccess;
}

471 472
QRhi::FrameOpResult QRhiGles2::beginOffscreenFrame(QRhiCommandBuffer **cb)
{
473 474 475 476 477 478 479 480 481 482 483 484 485
    Q_ASSERT(!inFrame);

    if (!ensureContext())
        return QRhi::FrameOpError;

    inFrame = true;
    ofr.active = true;

    executeDeferredReleases();
    ofr.cbWrapper.resetState();
    *cb = &ofr.cbWrapper;

    return QRhi::FrameOpSuccess;
486 487
}

488
QRhi::FrameOpResult QRhiGles2::endOffscreenFrame()
489
{
490 491 492 493 494 495 496 497 498 499 500
    Q_ASSERT(inFrame && ofr.active);
    inFrame = false;
    ofr.active = false;

    if (!ensureContext())
        return QRhi::FrameOpError;

    executeCommandBuffer(&ofr.cbWrapper);

    ++finishedFrameCount;
    return QRhi::FrameOpSuccess;;
501 502
}

503 504 505
QRhi::FrameOpResult QRhiGles2::finish()
{
    Q_ASSERT(!inPass);
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520
    if (inFrame) {
        if (ofr.active) {
            Q_ASSERT(!currentSwapChain);
            if (!ensureContext())
                return QRhi::FrameOpError;
            executeCommandBuffer(&ofr.cbWrapper);
            ofr.cbWrapper.resetCommands();
        } else {
            Q_ASSERT(currentSwapChain);
            if (!ensureContext(currentSwapChain->surface))
                return QRhi::FrameOpError;
            executeCommandBuffer(&currentSwapChain->cb);
            currentSwapChain->cb.resetCommands();
        }
    }
521 522 523
    return QRhi::FrameOpSuccess;
}

524
void QRhiGles2::enqueueResourceUpdates(QRhiCommandBuffer *cb, QRhiResourceUpdateBatch *resourceUpdates)
525
{
526
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);
527 528 529 530
    QRhiResourceUpdateBatchPrivate *ud = QRhiResourceUpdateBatchPrivate::get(resourceUpdates);

    for (const QRhiResourceUpdateBatchPrivate::DynamicBufferUpdate &u : ud->dynamicBufferUpdates) {
        QGles2Buffer *bufD = QRHI_RES(QGles2Buffer, u.buf);
Laszlo Agocs's avatar
Laszlo Agocs committed
531 532
        Q_ASSERT(bufD->m_type == QRhiBuffer::Dynamic);
        if (bufD->m_usage.testFlag(QRhiBuffer::UniformBuffer)) {
533 534 535 536 537 538 539
            memcpy(bufD->ubuf.data() + u.offset, u.data.constData(), u.data.size());
            QGles2Buffer::ChangeRange &r(bufD->ubufChangeRange);
            if (r.changeBegin == -1 || u.offset < r.changeBegin)
                r.changeBegin = u.offset;
            if (r.changeEnd == -1 || u.offset + u.data.size() > r.changeEnd)
                r.changeEnd = u.offset + u.data.size();
        } else {
540 541 542 543 544 545 546 547
            QGles2CommandBuffer::Command cmd;
            cmd.cmd = QGles2CommandBuffer::Command::BufferSubData;
            cmd.args.bufferSubData.target = bufD->target;
            cmd.args.bufferSubData.buffer = bufD->buffer;
            cmd.args.bufferSubData.offset = u.offset;
            cmd.args.bufferSubData.size = u.data.size();
            cmd.args.bufferSubData.data = cbD->retainData(u.data);
            cbD->commands.append(cmd);
548 549 550 551 552
        }
    }

    for (const QRhiResourceUpdateBatchPrivate::StaticBufferUpload &u : ud->staticBufferUploads) {
        QGles2Buffer *bufD = QRHI_RES(QGles2Buffer, u.buf);
Laszlo Agocs's avatar
Laszlo Agocs committed
553
        Q_ASSERT(bufD->m_type != QRhiBuffer::Dynamic);
554
        Q_ASSERT(u.offset + u.data.size() <= bufD->m_size);
Laszlo Agocs's avatar
Laszlo Agocs committed
555
        if (bufD->m_usage.testFlag(QRhiBuffer::UniformBuffer)) {
Laszlo Agocs's avatar
Laszlo Agocs committed
556
            memcpy(bufD->ubuf.data() + u.offset, u.data.constData(), u.data.size());
557 558
            bufD->ubufChangeRange = { 0, u.data.size() };
        } else {
559
            QGles2CommandBuffer::Command cmd;
560 561 562 563 564 565
            cmd.cmd = QGles2CommandBuffer::Command::BufferSubData;
            cmd.args.bufferSubData.target = bufD->target;
            cmd.args.bufferSubData.buffer = bufD->buffer;
            cmd.args.bufferSubData.offset = u.offset;
            cmd.args.bufferSubData.size = u.data.size();
            cmd.args.bufferSubData.data = cbD->retainData(u.data);
566
            cbD->commands.append(cmd);
567 568 569 570 571
        }
    }

    for (const QRhiResourceUpdateBatchPrivate::TextureUpload &u : ud->textureUploads) {
        QGles2Texture *texD = QRHI_RES(QGles2Texture, u.tex);
572
        const bool isCompressed = isCompressedFormat(texD->m_format);
Laszlo Agocs's avatar
Laszlo Agocs committed
573
        const bool isCubeMap = texD->m_flags.testFlag(QRhiTexture::CubeMap);
574 575
        const GLenum targetBase = isCubeMap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : texD->target;
        for (int layer = 0, layerCount = u.desc.layers.count(); layer != layerCount; ++layer) {
Laszlo Agocs's avatar
Laszlo Agocs committed
576
            const QRhiTextureUploadDescription::Layer &layerDesc(u.desc.layers[layer]);
577 578
            f->glBindTexture(targetBase + layer, texD->texture);
            for (int level = 0, levelCount = layerDesc.mipImages.count(); level != levelCount; ++level) {
Laszlo Agocs's avatar
Laszlo Agocs committed
579
                const QRhiTextureUploadDescription::Layer::MipLevel mipDesc(layerDesc.mipImages[level]);
580 581
                const int dx = mipDesc.destinationTopLeft.x();
                const int dy = mipDesc.destinationTopLeft.y();
582
                if (isCompressed && !mipDesc.compressedData.isEmpty()) {
583
                    int w, h;
584
                    if (mipDesc.sourceSize.isEmpty()) {
585 586 587
                        w = qFloor(float(qMax(1, texD->m_pixelSize.width() >> level)));
                        h = qFloor(float(qMax(1, texD->m_pixelSize.height() >> level)));
                    } else {
588 589
                        w = mipDesc.sourceSize.width();
                        h = mipDesc.sourceSize.height();
590
                    }
591
                    if (texD->specified) {
592 593 594 595 596 597 598 599 600 601 602 603
                        QGles2CommandBuffer::Command cmd;
                        cmd.cmd = QGles2CommandBuffer::Command::CompressedSubImage;
                        cmd.args.compressedSubImage.target = targetBase + layer;
                        cmd.args.compressedSubImage.level = level;
                        cmd.args.compressedSubImage.dx = dx;
                        cmd.args.compressedSubImage.dy = dy;
                        cmd.args.compressedSubImage.w = w;
                        cmd.args.compressedSubImage.h = h;
                        cmd.args.compressedSubImage.glintformat = texD->glintformat;
                        cmd.args.compressedSubImage.size = mipDesc.compressedData.size();
                        cmd.args.compressedSubImage.data = cbD->retainData(mipDesc.compressedData);
                        cbD->commands.append(cmd);
604
                    } else {
605 606 607 608 609 610 611 612 613 614
                        QGles2CommandBuffer::Command cmd;
                        cmd.cmd = QGles2CommandBuffer::Command::CompressedImage;
                        cmd.args.compressedImage.target = targetBase + layer;
                        cmd.args.compressedImage.level = level;
                        cmd.args.compressedImage.glintformat = texD->glintformat;
                        cmd.args.compressedImage.w = w;
                        cmd.args.compressedImage.h = h;
                        cmd.args.compressedImage.size = mipDesc.compressedData.size();
                        cmd.args.compressedImage.data = cbD->retainData(mipDesc.compressedData);
                        cbD->commands.append(cmd);
615 616
                    }
                } else {
617 618 619
                    QImage img = mipDesc.image;
                    int w = img.width();
                    int h = img.height();
620 621
                    QGles2CommandBuffer::Command cmd;
                    cmd.cmd = QGles2CommandBuffer::Command::SubImage;
622 623 624 625 626 627 628 629 630
                    if (!mipDesc.sourceSize.isEmpty() || !mipDesc.sourceTopLeft.isNull()) {
                        const int sx = mipDesc.sourceTopLeft.x();
                        const int sy = mipDesc.sourceTopLeft.y();
                        if (!mipDesc.sourceSize.isEmpty()) {
                            w = mipDesc.sourceSize.width();
                            h = mipDesc.sourceSize.height();
                        }
                        img = img.copy(sx, sy, w, h);
                    }
631 632 633 634 635 636 637 638 639 640
                    cmd.args.subImage.target = targetBase + layer;
                    cmd.args.subImage.level = level;
                    cmd.args.subImage.dx = dx;
                    cmd.args.subImage.dy = dy;
                    cmd.args.subImage.w = w;
                    cmd.args.subImage.h = h;
                    cmd.args.subImage.glformat = texD->glformat;
                    cmd.args.subImage.gltype = texD->gltype;
                    cmd.args.subImage.data = cbD->retainImage(img);
                    cbD->commands.append(cmd);
641
                }
642 643
            }
        }
644
        texD->specified = true;
645 646
    }

Laszlo Agocs's avatar
Laszlo Agocs committed
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664
    for (const QRhiResourceUpdateBatchPrivate::TextureCopy &u : ud->textureCopies) {
        Q_ASSERT(u.src && u.dst);
        QGles2Texture *srcD = QRHI_RES(QGles2Texture, u.src);
        QGles2Texture *dstD = QRHI_RES(QGles2Texture, u.dst);

        const QSize size = u.desc.pixelSize.isEmpty() ? srcD->m_pixelSize : u.desc.pixelSize;
        // source offset is bottom-left
        const float sx = u.desc.sourceTopLeft.x();
        const float sy = srcD->m_pixelSize.height() - (u.desc.sourceTopLeft.y() + size.height() - 1);
        // destination offset is top-left
        const float dx = u.desc.destinationTopLeft.x();
        const float dy = u.desc.destinationTopLeft.y();

        const GLenum srcTargetBase = srcD->m_flags.testFlag(QRhiTexture::CubeMap) ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : srcD->target;
        const GLenum srcTarget = srcTargetBase + u.desc.sourceLayer;
        const GLenum dstTargetBase = dstD->m_flags.testFlag(QRhiTexture::CubeMap) ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : dstD->target;
        const GLenum dstTarget = dstTargetBase + u.desc.destinationLayer;

665 666
        QGles2CommandBuffer::Command cmd;
        cmd.cmd = QGles2CommandBuffer::Command::CopyTex;
Laszlo Agocs's avatar
Laszlo Agocs committed
667

668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693
        cmd.args.copyTex.srcTarget = srcTarget;
        cmd.args.copyTex.srcTexture = srcD->texture;
        cmd.args.copyTex.srcLevel = u.desc.sourceLevel;
        cmd.args.copyTex.srcX = sx;
        cmd.args.copyTex.srcY = sy;

        cmd.args.copyTex.dstTarget = dstTarget;
        cmd.args.copyTex.dstTexture = dstD->texture;
        cmd.args.copyTex.dstLevel = u.desc.destinationLevel;
        cmd.args.copyTex.dstX = dx;
        cmd.args.copyTex.dstY = dy;

        cmd.args.copyTex.w = size.width();
        cmd.args.copyTex.h = size.height();

        cbD->commands.append(cmd);
    }

    for (const QRhiResourceUpdateBatchPrivate::TextureRead &u : ud->textureReadbacks) {
        QGles2CommandBuffer::Command cmd;
        cmd.cmd = QGles2CommandBuffer::Command::ReadPixels;
        cmd.args.readPixels.result = u.result;
        cmd.args.readPixels.texture = QRHI_RES(QGles2Texture, u.rb.texture);
        cmd.args.readPixels.layer = u.rb.layer;
        cmd.args.readPixels.level = u.rb.level;
        cbD->commands.append(cmd);
Laszlo Agocs's avatar
Laszlo Agocs committed
694 695
    }

696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
    ud->free();
}

static inline GLenum toGlTopology(QRhiGraphicsPipeline::Topology t)
{
    switch (t) {
    case QRhiGraphicsPipeline::Triangles:
        return GL_TRIANGLES;
    case QRhiGraphicsPipeline::TriangleStrip:
        return GL_TRIANGLE_STRIP;
    case QRhiGraphicsPipeline::Lines:
        return GL_LINES;
    case QRhiGraphicsPipeline::LineStrip:
        return GL_LINE_STRIP;
    case QRhiGraphicsPipeline::Points:
        return GL_POINTS;
    default:
        Q_UNREACHABLE();
        return GL_TRIANGLES;
    }
}

static inline GLenum toGlCullMode(QRhiGraphicsPipeline::CullMode c)
{
    switch (c) {
    case QRhiGraphicsPipeline::Front:
        return GL_FRONT;
    case QRhiGraphicsPipeline::Back:
        return GL_BACK;
    default:
        Q_UNREACHABLE();
        return GL_BACK;
    }
}

static inline GLenum toGlFrontFace(QRhiGraphicsPipeline::FrontFace f)
{
    switch (f) {
    case QRhiGraphicsPipeline::CCW:
        return GL_CCW;
    case QRhiGraphicsPipeline::CW:
        return GL_CW;
    default:
        Q_UNREACHABLE();
        return GL_CCW;
    }
}

static inline GLenum toGlBlendFactor(QRhiGraphicsPipeline::BlendFactor f)
{
    switch (f) {
    case QRhiGraphicsPipeline::Zero:
        return GL_ZERO;
    case QRhiGraphicsPipeline::One:
        return GL_ONE;
    case QRhiGraphicsPipeline::SrcColor:
        return GL_SRC_COLOR;
    case QRhiGraphicsPipeline::OneMinusSrcColor:
        return GL_ONE_MINUS_SRC_COLOR;
    case QRhiGraphicsPipeline::DstColor:
        return GL_DST_COLOR;
    case QRhiGraphicsPipeline::OneMinusDstColor:
        return GL_ONE_MINUS_DST_COLOR;
    case QRhiGraphicsPipeline::SrcAlpha:
        return GL_SRC_ALPHA;
    case QRhiGraphicsPipeline::OneMinusSrcAlpha:
        return GL_ONE_MINUS_SRC_ALPHA;
    case QRhiGraphicsPipeline::DstAlpha:
        return GL_DST_ALPHA;
    case QRhiGraphicsPipeline::OneMinusDstAlpha:
        return GL_ONE_MINUS_DST_ALPHA;
    case QRhiGraphicsPipeline::ConstantColor:
        return GL_CONSTANT_COLOR;
    case QRhiGraphicsPipeline::OneMinusConstantColor:
        return GL_ONE_MINUS_CONSTANT_COLOR;
    case QRhiGraphicsPipeline::ConstantAlpha:
        return GL_CONSTANT_ALPHA;
    case QRhiGraphicsPipeline::OneMinusConstantAlpha:
        return GL_ONE_MINUS_CONSTANT_ALPHA;
    case QRhiGraphicsPipeline::SrcAlphaSaturate:
        return GL_SRC_ALPHA_SATURATE;
    case QRhiGraphicsPipeline::Src1Color:
        Q_FALLTHROUGH();
    case QRhiGraphicsPipeline::OneMinusSrc1Color:
        Q_FALLTHROUGH();
    case QRhiGraphicsPipeline::Src1Alpha:
        Q_FALLTHROUGH();
    case QRhiGraphicsPipeline::OneMinusSrc1Alpha:
        qWarning("Unsupported blend factor %d", f);
        return GL_ZERO;
    default:
        Q_UNREACHABLE();
        return GL_ZERO;
    }
}

static inline GLenum toGlBlendOp(QRhiGraphicsPipeline::BlendOp op)
{
    switch (op) {
    case QRhiGraphicsPipeline::Add:
        return GL_FUNC_ADD;
    case QRhiGraphicsPipeline::Subtract:
        return GL_FUNC_SUBTRACT;
    case QRhiGraphicsPipeline::ReverseSubtract:
        return GL_FUNC_REVERSE_SUBTRACT;
    case QRhiGraphicsPipeline::Min:
        return GL_MIN;
    case QRhiGraphicsPipeline::Max:
        return GL_MAX;
    default:
        Q_UNREACHABLE();
        return GL_FUNC_ADD;
    }
}

static inline GLenum toGlCompareOp(QRhiGraphicsPipeline::CompareOp op)
{
    switch (op) {
    case QRhiGraphicsPipeline::Never:
        return GL_NEVER;
    case QRhiGraphicsPipeline::Less:
        return GL_LESS;
    case QRhiGraphicsPipeline::Equal:
        return GL_EQUAL;
    case QRhiGraphicsPipeline::LessOrEqual:
        return GL_LEQUAL;
    case QRhiGraphicsPipeline::Greater:
        return GL_GREATER;
    case QRhiGraphicsPipeline::NotEqual:
        return GL_NOTEQUAL;
    case QRhiGraphicsPipeline::GreaterOrEqual:
        return GL_GEQUAL;
    case QRhiGraphicsPipeline::Always:
        return GL_ALWAYS;
    default:
        Q_UNREACHABLE();
        return GL_ALWAYS;
    }
}

static inline GLenum toGlStencilOp(QRhiGraphicsPipeline::StencilOp op)
{
    switch (op) {
    case QRhiGraphicsPipeline::StencilZero:
        return GL_ZERO;
    case QRhiGraphicsPipeline::Keep:
        return GL_KEEP;
    case QRhiGraphicsPipeline::Replace:
        return GL_REPLACE;
    case QRhiGraphicsPipeline::IncrementAndClamp:
        return GL_INCR;
    case QRhiGraphicsPipeline::DecrementAndClamp:
        return GL_DECR;
    case QRhiGraphicsPipeline::Invert:
        return GL_INVERT;
    case QRhiGraphicsPipeline::IncrementAndWrap:
        return GL_INCR_WRAP;
    case QRhiGraphicsPipeline::DecrementAndWrap:
        return GL_DECR_WRAP;
    default:
        Q_UNREACHABLE();
        return GL_KEEP;
    }
}

static inline GLenum toGlMinFilter(QRhiSampler::Filter f, QRhiSampler::Filter m)
{
    switch (f) {
    case QRhiSampler::Nearest:
        if (m == QRhiSampler::None)
            return GL_NEAREST;
        else
            return m == QRhiSampler::Nearest ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST_MIPMAP_LINEAR;
    case QRhiSampler::Linear:
        if (m == QRhiSampler::None)
            return GL_LINEAR;
        else
            return m == QRhiSampler::Nearest ? GL_LINEAR_MIPMAP_NEAREST : GL_LINEAR_MIPMAP_LINEAR;
    default:
        Q_UNREACHABLE();
        return GL_LINEAR;
    }
}

static inline GLenum toGlMagFilter(QRhiSampler::Filter f)
{
    switch (f) {
    case QRhiSampler::Nearest:
        return GL_NEAREST;
    case QRhiSampler::Linear:
        return GL_LINEAR;
    default:
        Q_UNREACHABLE();
        return GL_LINEAR;
    }
}

static inline GLenum toGlWrapMode(QRhiSampler::AddressMode m)
{
    switch (m) {
    case QRhiSampler::Repeat:
        return GL_REPEAT;
    case QRhiSampler::ClampToEdge:
        return GL_CLAMP_TO_EDGE;
    case QRhiSampler::Mirror:
        return GL_MIRRORED_REPEAT;
    case QRhiSampler::MirrorOnce:
        Q_FALLTHROUGH();
    case QRhiSampler::Border:
        qWarning("Unsupported wrap mode %d", m);
        return GL_CLAMP_TO_EDGE;
    default:
        Q_UNREACHABLE();
        return GL_CLAMP_TO_EDGE;
    }
}

void QRhiGles2::executeCommandBuffer(QRhiCommandBuffer *cb)
{
    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);
    GLenum indexType = GL_UNSIGNED_SHORT;
    quint32 indexStride = sizeof(quint16);
    quint32 indexOffset = 0;

    for (const QGles2CommandBuffer::Command &cmd : qAsConst(cbD->commands)) {
        switch (cmd.cmd) {
        case QGles2CommandBuffer::Command::Viewport:
            f->glViewport(cmd.args.viewport.x, cmd.args.viewport.y, cmd.args.viewport.w, cmd.args.viewport.h);
            f->glDepthRangef(cmd.args.viewport.d0, cmd.args.viewport.d1);
            break;
        case QGles2CommandBuffer::Command::Scissor:
            f->glScissor(cmd.args.scissor.x, cmd.args.scissor.y, cmd.args.scissor.w, cmd.args.scissor.h);
            break;
        case QGles2CommandBuffer::Command::BlendConstants:
            f->glBlendColor(cmd.args.blendConstants.r, cmd.args.blendConstants.g, cmd.args.blendConstants.b, cmd.args.blendConstants.a);
            break;
        case QGles2CommandBuffer::Command::StencilRef:
        {
Laszlo Agocs's avatar
Laszlo Agocs committed
934 935 936 937
            QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, cmd.args.stencilRef.ps);
            if (psD) {
                f->glStencilFuncSeparate(GL_FRONT, toGlCompareOp(psD->m_stencilFront.compareOp), cmd.args.stencilRef.ref, psD->m_stencilReadMask);
                f->glStencilFuncSeparate(GL_BACK, toGlCompareOp(psD->m_stencilBack.compareOp), cmd.args.stencilRef.ref, psD->m_stencilReadMask);
938 939 940 941 942 943 944
            } else {
                qWarning("No graphics pipeline active for setStencilRef; ignored");
            }
        }
            break;
        case QGles2CommandBuffer::Command::BindVertexBuffer:
        {
Laszlo Agocs's avatar
Laszlo Agocs committed
945 946 947
            QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, cmd.args.bindVertexBuffer.ps);
            if (psD) {
                for (const QRhiVertexInputLayout::Attribute &a : psD->m_vertexInputLayout.attributes) {
948 949 950 951 952 953
                    if (a.binding != cmd.args.bindVertexBuffer.binding)
                        continue;

                    // we do not support more than one vertex buffer
                    f->glBindBuffer(GL_ARRAY_BUFFER, cmd.args.bindVertexBuffer.buffer);

Laszlo Agocs's avatar
Laszlo Agocs committed
954
                    const int stride = psD->m_vertexInputLayout.bindings[a.binding].stride;
955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
                    int size = 1;
                    GLenum type = GL_FLOAT;
                    switch (a.format) {
                    case QRhiVertexInputLayout::Attribute::Float4:
                        type = GL_FLOAT;
                        size = 4;
                        break;
                    case QRhiVertexInputLayout::Attribute::Float3:
                        type = GL_FLOAT;
                        size = 3;
                        break;
                    case QRhiVertexInputLayout::Attribute::Float2:
                        type = GL_FLOAT;
                        size = 2;
                        break;
                    case QRhiVertexInputLayout::Attribute::Float:
                        type = GL_FLOAT;
                        size = 1;
                        break;
                    case QRhiVertexInputLayout::Attribute::UNormByte4:
                        type = GL_UNSIGNED_BYTE;
                        size = 4;
                        break;
                    case QRhiVertexInputLayout::Attribute::UNormByte2:
                        type = GL_UNSIGNED_BYTE;
                        size = 2;
                        break;
                    case QRhiVertexInputLayout::Attribute::UNormByte:
                        type = GL_UNSIGNED_BYTE;
                        size = 1;
                        break;
                    default:
                        break;
                    }
                    quint32 ofs = a.offset + cmd.args.bindVertexBuffer.offset;
                    f->glVertexAttribPointer(a.location, size, type, GL_FALSE, stride,
                                             reinterpret_cast<const GLvoid *>(quintptr(ofs)));
                    f->glEnableVertexAttribArray(a.location);
                }
            } else {
                qWarning("No graphics pipeline active for setVertexInput; ignored");
            }
        }
            break;
        case QGles2CommandBuffer::Command::BindIndexBuffer:
            indexType = cmd.args.bindIndexBuffer.type;
            indexStride = indexType == GL_UNSIGNED_SHORT ? sizeof(quint16) : sizeof(quint32);
            indexOffset = cmd.args.bindIndexBuffer.offset;
            f->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cmd.args.bindIndexBuffer.buffer);
            break;
        case QGles2CommandBuffer::Command::Draw:
        {
Laszlo Agocs's avatar
Laszlo Agocs committed
1007 1008 1009
            QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, cmd.args.draw.ps);
            if (psD)
                f->glDrawArrays(psD->drawMode, cmd.args.draw.firstVertex, cmd.args.draw.vertexCount);
1010 1011 1012 1013 1014 1015
            else
                qWarning("No graphics pipeline active for draw; ignored");
        }
            break;
        case QGles2CommandBuffer::Command::DrawIndexed:
        {
Laszlo Agocs's avatar
Laszlo Agocs committed
1016 1017
            QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, cmd.args.drawIndexed.ps);
            if (psD) {
1018
                quint32 ofs = cmd.args.drawIndexed.firstIndex * indexStride + indexOffset;
Laszlo Agocs's avatar
Laszlo Agocs committed
1019
                f->glDrawElements(psD->drawMode,
1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
                                  cmd.args.drawIndexed.indexCount,
                                  indexType,
                                  reinterpret_cast<const GLvoid *>(quintptr(ofs)));
            } else {
                qWarning("No graphics pipeline active for drawIndexed; ignored");
            }
        }
            break;
        case QGles2CommandBuffer::Command::BindGraphicsPipeline:
            if (cmd.args.bindGraphicsPipeline.resOnlyChange) {
                setChangedUniforms(QRHI_RES(QGles2GraphicsPipeline, cmd.args.bindGraphicsPipeline.ps),
                                   cmd.args.bindGraphicsPipeline.srb,
                                   false);
            } else {
                executeBindGraphicsPipeline(cmd.args.bindGraphicsPipeline.ps, cmd.args.bindGraphicsPipeline.srb);
            }
            break;
        case QGles2CommandBuffer::Command::BindFramebuffer:
            if (cmd.args.bindFramebuffer.rt)
                f->glBindFramebuffer(GL_FRAMEBUFFER,
                                     QRHI_RES(QGles2TextureRenderTarget, cmd.args.bindFramebuffer.rt)->framebuffer);
            else
                f->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
            break;
        case QGles2CommandBuffer::Command::Clear:
            f->glDisable(GL_SCISSOR_TEST);
            if (cmd.args.clear.mask & GL_COLOR_BUFFER_BIT) {
                f->glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
                f->glClearColor(cmd.args.clear.c[0], cmd.args.clear.c[1], cmd.args.clear.c[2], cmd.args.clear.c[3]);
            }
            if (cmd.args.clear.mask & GL_DEPTH_BUFFER_BIT) {
                f->glDepthMask(GL_TRUE);
                f->glClearDepthf(cmd.args.clear.d);
            }
            if (cmd.args.clear.mask & GL_STENCIL_BUFFER_BIT) {
                f->glStencilMask(GL_TRUE);
                f->glClearStencil(cmd.args.clear.s);
            }
            f->glClear(cmd.args.clear.mask);
            break;
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
        case QGles2CommandBuffer::Command::BufferSubData:
            f->glBindBuffer(cmd.args.bufferSubData.target, cmd.args.bufferSubData.buffer);
            f->glBufferSubData(cmd.args.bufferSubData.target, cmd.args.bufferSubData.offset, cmd.args.bufferSubData.size,
                               cmd.args.bufferSubData.data);
            break;
        case QGles2CommandBuffer::Command::CopyTex:
        {
            // ugh...
            GLuint fbo;
            f->glGenFramebuffers(1, &fbo);
            f->glBindFramebuffer(GL_FRAMEBUFFER, fbo);
            f->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                                      cmd.args.copyTex.srcTarget, cmd.args.copyTex.srcTexture, cmd.args.copyTex.srcLevel);
            f->glBindTexture(cmd.args.copyTex.dstTarget, cmd.args.copyTex.dstTexture);
            f->glCopyTexSubImage2D(cmd.args.copyTex.dstTarget, cmd.args.copyTex.dstLevel,
                                   cmd.args.copyTex.dstX, cmd.args.copyTex.dstY,
                                   cmd.args.copyTex.srcX, cmd.args.copyTex.srcY,
                                   cmd.args.copyTex.w, cmd.args.copyTex.h);
            f->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
            f->glDeleteFramebuffers(1, &fbo);
        }
            break;
1082 1083
        case QGles2CommandBuffer::Command::ReadPixels:
        {
Laszlo Agocs's avatar
Laszlo Agocs committed
1084
            // ### more formats
1085
            QRhiReadbackResult *result = cmd.args.readPixels.result;
1086
            QGles2Texture *texD = cmd.args.readPixels.texture;
1087
            GLuint fbo = 0;
1088
            if (texD) {
1089 1090 1091 1092 1093
                result->pixelSize = texD->m_pixelSize;
                result->format = texD->m_format;
                // this is going to be suboptimal but will do for now
                f->glGenFramebuffers(1, &fbo);
                f->glBindFramebuffer(GL_FRAMEBUFFER, fbo);
Laszlo Agocs's avatar
Laszlo Agocs committed
1094 1095 1096
                const GLenum targetBase = texD->m_flags.testFlag(QRhiTexture::CubeMap) ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : texD->target;
                const GLenum target = targetBase + cmd.args.readPixels.layer;
                f->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, texD->texture, cmd.args.readPixels.level);
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
            } else {
                result->pixelSize = currentSwapChain->pixelSize;
                result->format = QRhiTexture::RGBA8;
            }
            result->data.resize(result->pixelSize.width() * result->pixelSize.height() * 4);
            f->glReadPixels(0, 0, result->pixelSize.width(), result->pixelSize.height(),
                            GL_RGBA, GL_UNSIGNED_BYTE,
                            result->data.data());
            if (fbo) {
                f->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
                f->glDeleteFramebuffers(1, &fbo);
            }
            if (result->completed)
                result->completed();
        }
            break;
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
        case QGles2CommandBuffer::Command::SubImage:
            f->glTexSubImage2D(cmd.args.subImage.target, cmd.args.subImage.level,
                               cmd.args.subImage.dx, cmd.args.subImage.dy,
                               cmd.args.subImage.w, cmd.args.subImage.h,
                               cmd.args.subImage.glformat, cmd.args.subImage.gltype,
                               cmd.args.subImage.data);
            break;
        case QGles2CommandBuffer::Command::CompressedImage:
            f->glCompressedTexImage2D(cmd.args.compressedImage.target, cmd.args.compressedImage.level,
                                      cmd.args.compressedImage.glintformat,
                                      cmd.args.compressedImage.w, cmd.args.compressedImage.h, 0,
                                      cmd.args.compressedImage.size, cmd.args.compressedImage.data);
            break;
        case QGles2CommandBuffer::Command::CompressedSubImage:
            f->glCompressedTexSubImage2D(cmd.args.compressedSubImage.target, cmd.args.compressedSubImage.level,
                                         cmd.args.compressedSubImage.dx, cmd.args.compressedSubImage.dy,
                                         cmd.args.compressedSubImage.w, cmd.args.compressedSubImage.h,
                                         cmd.args.compressedSubImage.glintformat,
                                         cmd.args.compressedSubImage.size, cmd.args.compressedSubImage.data);
            break;
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
        default:
            break;
        }
    }
}

void QRhiGles2::executeBindGraphicsPipeline(QRhiGraphicsPipeline *ps, QRhiShaderResourceBindings *srb)
{
    QGles2GraphicsPipeline *psD = QRHI_RES(QGles2GraphicsPipeline, ps);

Laszlo Agocs's avatar
Laszlo Agocs committed
1143
    if (psD->m_flags.testFlag(QRhiGraphicsPipeline::UsesScissor))
1144 1145 1146
        f->glEnable(GL_SCISSOR_TEST);
    else
        f->glDisable(GL_SCISSOR_TEST);
Laszlo Agocs's avatar
Laszlo Agocs committed
1147
    if (psD->m_cullMode == QRhiGraphicsPipeline::None) {
1148 1149 1150
        f->glDisable(GL_CULL_FACE);
    } else {
        f->glEnable(GL_CULL_FACE);
Laszlo Agocs's avatar
Laszlo Agocs committed
1151
        f->glCullFace(toGlCullMode(psD->m_cullMode));
1152
    }
Laszlo Agocs's avatar
Laszlo Agocs committed
1153 1154 1155
    f->glFrontFace(toGlFrontFace(psD->m_frontFace));
    if (!psD->m_targetBlends.isEmpty()) {
        const QRhiGraphicsPipeline::TargetBlend &blend(psD->m_targetBlends.first()); // no MRT
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
        GLboolean wr = blend.colorWrite.testFlag(QRhiGraphicsPipeline::R);
        GLboolean wg = blend.colorWrite.testFlag(QRhiGraphicsPipeline::G);
        GLboolean wb = blend.colorWrite.testFlag(QRhiGraphicsPipeline::B);
        GLboolean wa = blend.colorWrite.testFlag(QRhiGraphicsPipeline::A);
        f->glColorMask(wr, wg, wb, wa);
        if (blend.enable) {
            f->glEnable(GL_BLEND);
            f->glBlendFuncSeparate(toGlBlendFactor(blend.srcColor),
                                   toGlBlendFactor(blend.dstColor),
                                   toGlBlendFactor(blend.srcAlpha),
                                   toGlBlendFactor(blend.dstAlpha));
            f->glBlendEquationSeparate(toGlBlendOp(blend.opColor), toGlBlendOp(blend.opAlpha));
        } else {
            f->glDisable(GL_BLEND);
        }
    } else {
        f->glDisable(GL_BLEND);
    }
Laszlo Agocs's avatar
Laszlo Agocs committed
1174
    if (psD->m_depthTest)
1175 1176 1177
        f->glEnable(GL_DEPTH_TEST);
    else
        f->glDisable(GL_DEPTH_TEST);
Laszlo Agocs's avatar
Laszlo Agocs committed
1178
    if (psD->m_depthWrite)
1179 1180 1181
        f->glDepthMask(GL_TRUE);
    else
        f->glDepthMask(GL_FALSE);
Laszlo Agocs's avatar
Laszlo Agocs committed
1182 1183
    f->glDepthFunc(toGlCompareOp(psD->m_depthOp));
    if (psD->m_stencilTest) {
1184
        f->glEnable(GL_STENCIL_TEST);
Laszlo Agocs's avatar
Laszlo Agocs committed
1185
        f->glStencilFuncSeparate(GL_FRONT, toGlCompareOp(psD->m_stencilFront.compareOp), 0, psD->m_stencilReadMask);
1186
        f->glStencilOpSeparate(GL_FRONT,
Laszlo Agocs's avatar
Laszlo Agocs committed
1187 1188 1189 1190 1191
                               toGlStencilOp(psD->m_stencilFront.failOp),
                               toGlStencilOp(psD->m_stencilFront.depthFailOp),
                               toGlStencilOp(psD->m_stencilFront.passOp));
        f->glStencilMaskSeparate(GL_FRONT, psD->m_stencilWriteMask);
        f->glStencilFuncSeparate(GL_BACK, toGlCompareOp(psD->m_stencilBack.compareOp), 0, psD->m_stencilReadMask);
1192
        f->glStencilOpSeparate(GL_BACK,
Laszlo Agocs's avatar
Laszlo Agocs committed
1193 1194 1195 1196
                               toGlStencilOp(psD->m_stencilBack.failOp),
                               toGlStencilOp(psD->m_stencilBack.depthFailOp),
                               toGlStencilOp(psD->m_stencilBack.passOp));
        f->glStencilMaskSeparate(GL_BACK, psD->m_stencilWriteMask);
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207
    } else {
        f->glDisable(GL_STENCIL_TEST);
    }

    f->glUseProgram(psD->program);
    // buffer data cannot change within the pass so this time is as good to update uniforms as any
    setChangedUniforms(psD, srb, false);
}

void QRhiGles2::setChangedUniforms(QGles2GraphicsPipeline *psD, QRhiShaderResourceBindings *srb, bool changedOnly)
{
Laszlo Agocs's avatar
Laszlo Agocs committed
1208
    QGles2ShaderResourceBindings *srbD = QRHI_RES(QGles2ShaderResourceBindings, srb);
Laszlo Agocs's avatar
Laszlo Agocs committed
1209

Laszlo Agocs's avatar
Laszlo Agocs committed
1210 1211
    for (int i = 0, ie = srbD->m_bindings.count(); i != ie; ++i) {
        const QRhiShaderResourceBinding &b(srbD->m_bindings[i]);
Laszlo Agocs's avatar
Laszlo Agocs committed
1212 1213
        QGles2ShaderResourceBindings::BoundResourceData &bd(srbD->boundResourceData[i]);

1214
        switch (b.type) {
Laszlo Agocs's avatar
Laszlo Agocs committed
1215
        case QRhiShaderResourceBinding::UniformBuffer:
1216 1217 1218 1219 1220
        {
            QGles2Buffer *bufD = QRHI_RES(QGles2Buffer, b.ubuf.buf);
            if (changedOnly && bufD->ubufChangeRange.isNull()) // do not set again when nothing changed
                break;
            const QByteArray bufView = QByteArray::fromRawData(bufD->ubuf.constData() + b.ubuf.offset,
Laszlo Agocs's avatar
Laszlo Agocs committed
1221
                                                               b.ubuf.maybeSize ? b.ubuf.maybeSize : bufD->m_size);
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
            for (QGles2GraphicsPipeline::Uniform &uniform : psD->uniforms) {
                if (uniform.binding == b.binding
                        && (!changedOnly ||
                            (uniform.offset >= uint(bufD->ubufChangeRange.changeBegin)
                             && uniform.offset < uint(bufD->ubufChangeRange.changeEnd))))
                {
                    memcpy(uniform.data.data(), bufView.constData() + uniform.offset, uniform.data.size());

                    switch (uniform.type) {
                    case QShaderDescription::Float:
                        f->glUniform1f(uniform.glslLocation, *reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Vec2:
                        f->glUniform2fv(uniform.glslLocation, 1, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Vec3:
                        f->glUniform3fv(uniform.glslLocation, 1, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Vec4:
                        f->glUniform4fv(uniform.glslLocation, 1, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Mat2:
                        f->glUniformMatrix2fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Mat3:
                        f->glUniformMatrix3fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Mat4:
                        f->glUniformMatrix4fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Int:
                        f->glUniform1i(uniform.glslLocation, *reinterpret_cast<const qint32 *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Int2:
                        f->glUniform2iv(uniform.glslLocation, 1, reinterpret_cast<const qint32 *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Int3:
                        f->glUniform3iv(uniform.glslLocation, 1, reinterpret_cast<const qint32 *>(uniform.data.constData()));
                        break;
                    case QShaderDescription::Int4:
                        f->glUniform4iv(uniform.glslLocation, 1, reinterpret_cast<const qint32 *>(uniform.data.constData()));
                        break;
                    // ### more types
                    default:
                        break;
                    }
                }
            }

            bufD->ubufChangeRange = QGles2Buffer::ChangeRange();
        }
            break;
Laszlo Agocs's avatar
Laszlo Agocs committed
1274
        case QRhiShaderResourceBinding::SampledTexture:
1275 1276 1277 1278
        {
            QGles2Texture *texD = QRHI_RES(QGles2Texture, b.stex.tex);
            QGles2Sampler *samplerD = QRHI_RES(QGles2Sampler, b.stex.sampler);

Laszlo Agocs's avatar
Laszlo Agocs committed
1279 1280 1281 1282 1283 1284 1285
            const bool textureChanged = QRHI_RES(QGles2Texture, b.stex.tex)->generation != bd.stex.texGeneration;
            if (textureChanged)
                bd.stex.texGeneration = QRHI_RES(QGles2Texture, b.stex.tex)->generation;
            const bool samplerChanged = QRHI_RES(QGles2Sampler, b.stex.sampler)->generation != bd.stex.samplerGeneration;
            if (samplerChanged)
                bd.stex.samplerGeneration = QRHI_RES(QGles2Sampler, b.stex.sampler)->generation;

1286 1287 1288 1289 1290 1291
            int texUnit = 0;
            for (QGles2GraphicsPipeline::Sampler &sampler : psD->samplers) {
                if (sampler.binding == b.binding) {
                    f->glActiveTexture(GL_TEXTURE0 + texUnit);
                    f->glBindTexture(texD->target, texD->texture);

Laszlo Agocs's avatar
Laszlo Agocs committed
1292 1293 1294 1295 1296 1297 1298
                    if (textureChanged || samplerChanged) {
                        f->glTexParameteri(texD->target, GL_TEXTURE_MIN_FILTER, samplerD->glminfilter);
                        f->glTexParameteri(texD->target, GL_TEXTURE_MAG_FILTER, samplerD->glmagfilter);
                        f->glTexParameteri(texD->target, GL_TEXTURE_WRAP_S, samplerD->glwraps);
                        f->glTexParameteri(texD->target, GL_TEXTURE_WRAP_T, samplerD->glwrapt);
                        f->glTexParameteri(texD->target, GL_TEXTURE_WRAP_R, samplerD->glwrapr);
                    }
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314

                    f->glUniform1i(sampler.glslLocation, texUnit);
                    ++texUnit;
                }
            }
            if (texUnit)
                f->glActiveTexture(GL_TEXTURE0);
        }
            break;
        default:
            Q_UNREACHABLE();
            break;
        }
    }
}

1315 1316 1317 1318 1319 1320 1321 1322 1323
void QRhiGles2::resourceUpdate(QRhiCommandBuffer *cb, QRhiResourceUpdateBatch *resourceUpdates)
{
    Q_ASSERT(inFrame && !inPass);

    enqueueResourceUpdates(cb, resourceUpdates);
}

void QRhiGles2::beginPass(QRhiCommandBuffer *cb,
                          QRhiRenderTarget *rt,
1324 1325 1326 1327 1328 1329 1330
                          const QRhiColorClearValue &colorClearValue,
                          const QRhiDepthStencilClearValue &depthStencilClearValue,
                          QRhiResourceUpdateBatch *resourceUpdates)
{
    Q_ASSERT(!inPass);

    if (resourceUpdates)
1331
        enqueueResourceUpdates(cb, resourceUpdates);
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346

    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);
    bool needsColorClear = true;
    QGles2BasicRenderTargetData *rtD = nullptr;
    QGles2CommandBuffer::Command fbCmd;
    fbCmd.cmd = QGles2CommandBuffer::Command::BindFramebuffer;
    switch (rt->type()) {
    case QRhiRenderTarget::RtRef:
        rtD = &QRHI_RES(QGles2ReferenceRenderTarget, rt)->d;
        fbCmd.args.bindFramebuffer.rt = nullptr;
        break;
    case QRhiRenderTarget::RtTexture:
    {
        QGles2TextureRenderTarget *rtTex = QRHI_RES(QGles2TextureRenderTarget, rt);
        rtD = &rtTex->d;
Laszlo Agocs's avatar
Laszlo Agocs committed
1347
        needsColorClear = !rtTex->m_flags.testFlag(QRhiTextureRenderTarget::PreserveColorContents);
1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376
        fbCmd.args.bindFramebuffer.rt = rtTex;
    }
        break;
    default:
        Q_UNREACHABLE();
        break;
    }
    cbD->commands.append(fbCmd);

    cbD->currentTarget = rt;

    Q_ASSERT(rtD->attCount == 1 || rtD->attCount == 2);
    QGles2CommandBuffer::Command clearCmd;
    clearCmd.cmd = QGles2CommandBuffer::Command::Clear;
    clearCmd.args.clear.mask = 0;
    if (rtD->attCount > 1)
        clearCmd.args.clear.mask |= GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
    if (needsColorClear)
        clearCmd.args.clear.mask |= GL_COLOR_BUFFER_BIT;

    memcpy(clearCmd.args.clear.c, &colorClearValue.rgba, sizeof(float) * 4);
    clearCmd.args.clear.d = depthStencilClearValue.d;
    clearCmd.args.clear.s = depthStencilClearValue.s;

    cbD->commands.append(clearCmd);

    inPass = true;
}

1377
void QRhiGles2::endPass(QRhiCommandBuffer *cb, QRhiResourceUpdateBatch *resourceUpdates)
1378 1379 1380 1381 1382 1383
{
    Q_ASSERT(inPass);
    inPass = false;

    QGles2CommandBuffer *cbD = QRHI_RES(QGles2CommandBuffer, cb);
    cbD->currentTarget = nullptr;
1384 1385

    if (resourceUpdates)
1386
        enqueueResourceUpdates(cb, resourceUpdates);
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
}

QGles2Buffer::QGles2Buffer(QRhiImplementation *rhi, Type type, UsageFlags usage, int size)
    : QRhiBuffer(rhi, type, usage, size)
{
}

void QGles2Buffer::release()
{
    if (!buffer)
        return;

    QRhiGles2::DeferredReleaseEntry e;
    e.type = QRhiGles2::DeferredReleaseEntry::Buffer;

    e.buffer.buffer = buffer;

    buffer = 0;

    QRHI_RES_RHI(QRhiGles2);
    rhiD->releaseQueue.append(e);
}

bool QGles2Buffer::build()
{
    QRHI_RES_RHI(QRhiGles2);

    if (buffer)
        release();

Laszlo Agocs's avatar
Laszlo Agocs committed
1417
    if (m_usage.testFlag(QRhiBuffer::UniformBuffer)) {
1418
        // special since we do not support uniform blocks in this backend
Laszlo Agocs's avatar
Laszlo Agocs committed
1419
        ubuf.resize(m_size);
1420 1421 1422
        return true;
    }

1423 1424
    if (!rhiD->ensureContext())
        return false;
1425

Laszlo Agocs's avatar
Laszlo Agocs committed
1426
    if (m_usage.testFlag(QRhiBuffer::VertexBuffer))
1427
        target = GL_ARRAY_BUFFER;
Laszlo Agocs's avatar
Laszlo Agocs committed
1428
    if (m_usage.testFlag(QRhiBuffer::IndexBuffer))
1429 1430 1431 1432
        target = GL_ELEMENT_ARRAY_BUFFER;

    rhiD->f->glGenBuffers(1, &buffer);
    rhiD->f->glBindBuffer(target, buffer);
Laszlo Agocs's avatar
Laszlo Agocs committed
1433
    rhiD->f->glBufferData(target, m_size, nullptr, m_type == Dynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
1434 1435 1436 1437 1438

    return true;
}

QGles2RenderBuffer::QGles2RenderBuffer(QRhiImplementation *rhi, Type type, const QSize &pixelSize,
Laszlo Agocs's avatar
Laszlo Agocs committed
1439 1440
                                       int sampleCount, QRhiRenderBuffer::Flags flags)
    : QRhiRenderBuffer(rhi, type, pixelSize, sampleCount, flags)
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466
{
}

void QGles2RenderBuffer::release()
{
    if (!renderbuffer)
        return;

    QRhiGles2::DeferredReleaseEntry e;
    e.type = QRhiGles2::DeferredReleaseEntry::RenderBuffer;

    e.renderbuffer.renderbuffer = renderbuffer;

    renderbuffer = 0;

    QRHI_RES_RHI(QRhiGles2);
    rhiD->releaseQueue.append(e);
}

bool QGles2RenderBuffer::build()
{
    QRHI_RES_RHI(QRhiGles2);

    if (renderbuffer)
        release();

Laszlo Agocs's avatar
Laszlo Agocs committed
1467
    if (m_flags.testFlag(ToBeUsedWithSwapChainOnly))
1468 1469
        return true;

1470 1471
    if (!rhiD->ensureContext())
        return false;
1472 1473 1474 1475

    rhiD->f->glGenRenderbuffers(1, &renderbuffer);
    rhiD->f->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);

Laszlo Agocs's avatar
Laszlo Agocs committed
1476
    switch (m_type) {
1477
    case QRhiRenderBuffer::DepthStencil:
Laszlo Agocs's avatar
Laszlo Agocs committed
1478
        rhiD->f->glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, m_pixelSize.width(), m_pixelSize.height());
1479 1480 1481 1482 1483 1484 1485 1486 1487
        break;
    default:
        Q_UNREACHABLE();
        break;
    }

    return true;
}

Laszlo Agocs's avatar
Laszlo Agocs committed
1488 1489 1490
QGles2Texture::QGles2Texture(QRhiImplementation *rhi, Format format, const QSize &pixelSize,
                             int sampleCount, Flags flags)
    : QRhiTexture(rhi, format, pixelSize, sampleCount, flags)
1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509
{
}

static inline QSize safeSize(const QSize &size)
{
    return size.isEmpty() ? QSize(16, 16) : size;
}

void QGles2Texture::release()
{
    if (!texture)
        return;

    QRhiGles2::DeferredReleaseEntry e;
    e.type = QRhiGles2::DeferredReleaseEntry::Texture;

    e.texture.texture = texture;

    texture = 0;
1510
    specified = false;
1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522

    QRHI_RES_RHI(QRhiGles2);
    rhiD->releaseQueue.append(e);
}

bool QGles2Texture::build()
{
    QRHI_RES_RHI(QRhiGles2);

    if (texture)
        release();

1523 1524
    if (!rhiD->ensureContext())
        return false;
1525

Laszlo Agocs's avatar
Laszlo Agocs committed
1526
    const QSize size = safeSize(m_pixelSize);
1527 1528
    // ### adjust size for npot when repeat with npot is not supported?

Laszlo Agocs's avatar
Laszlo Agocs committed
1529 1530
    const bool isCube = m_flags.testFlag(CubeMap);
    const bool hasMipMaps = m_flags.testFlag(MipMapped);
1531
    const int mipLevelCount = hasMipMaps ? qCeil(log2(qMax(size.width(), size.height()))) + 1 : 1;
1532
    const bool isCompressed = rhiD->isCompressedFormat(m_format);
1533 1534 1535 1536 1537 1538 1539

    // ### more formats
    target = isCube ? GL_TEXTURE_CUBE_MAP : GL_TEXTURE_2D;
    glintformat = GL_RGBA;
    glformat = GL_RGBA;
    gltype = GL_UNSIGNED_BYTE;

1540 1541 1542 1543 1544 1545 1546 1547
    if (isCompressed) {
        glintformat = toGlCompressedTextureFormat(m_format, m_flags);
        if (!glintformat) {
            qWarning("Compressed format %d not mappable to GL compressed format", m_format);
            return false;
        }
    }

1548
    rhiD->f->glGenTextures(1, &texture);
1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561

    if (!isCompressed) {
        if (hasMipMaps || isCube) {
            const GLenum targetBase = isCube ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : target;
            for (int layer = 0, layerCount = isCube ? 6 : 1; layer != layerCount; ++layer) {
                rhiD->f->glBindTexture(targetBase + layer, texture);
                for (int level = 0; level != mipLevelCount; ++level) {
                    const int w = qFloor(float(qMax(1, size.width() >> level)));
                    const int h = qFloor(float(qMax(1, size.height() >> level)));
                    rhiD->f->glTexImage2D(targetBase + layer, level, glintformat,
                                          w, h, 0,
                                          glformat, gltype, nullptr);
                }
1562
            }