| // |
| // Copyright 2015 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // FramebufferGL.cpp: Implements the class methods for FramebufferGL. |
| |
| #include "libANGLE/renderer/gl/FramebufferGL.h" |
| |
| #include "common/bitset_utils.h" |
| #include "common/debug.h" |
| #include "libANGLE/ContextState.h" |
| #include "libANGLE/State.h" |
| #include "libANGLE/FramebufferAttachment.h" |
| #include "libANGLE/angletypes.h" |
| #include "libANGLE/formatutils.h" |
| #include "libANGLE/renderer/ContextImpl.h" |
| #include "libANGLE/renderer/gl/BlitGL.h" |
| #include "libANGLE/renderer/gl/FunctionsGL.h" |
| #include "libANGLE/renderer/gl/RenderbufferGL.h" |
| #include "libANGLE/renderer/gl/StateManagerGL.h" |
| #include "libANGLE/renderer/gl/TextureGL.h" |
| #include "libANGLE/renderer/gl/WorkaroundsGL.h" |
| #include "libANGLE/renderer/gl/formatutilsgl.h" |
| #include "libANGLE/renderer/gl/renderergl_utils.h" |
| #include "platform/Platform.h" |
| |
| using namespace gl; |
| using angle::CheckedNumeric; |
| |
| namespace rx |
| { |
| |
| FramebufferGL::FramebufferGL(const FramebufferState &state, |
| const FunctionsGL *functions, |
| StateManagerGL *stateManager, |
| const WorkaroundsGL &workarounds, |
| BlitGL *blitter, |
| bool isDefault) |
| : FramebufferImpl(state), |
| mFunctions(functions), |
| mStateManager(stateManager), |
| mWorkarounds(workarounds), |
| mBlitter(blitter), |
| mFramebufferID(0), |
| mIsDefault(isDefault) |
| { |
| if (!mIsDefault) |
| { |
| mFunctions->genFramebuffers(1, &mFramebufferID); |
| } |
| } |
| |
| FramebufferGL::FramebufferGL(GLuint id, |
| const FramebufferState &state, |
| const FunctionsGL *functions, |
| const WorkaroundsGL &workarounds, |
| BlitGL *blitter, |
| StateManagerGL *stateManager) |
| : FramebufferImpl(state), |
| mFunctions(functions), |
| mStateManager(stateManager), |
| mWorkarounds(workarounds), |
| mBlitter(blitter), |
| mFramebufferID(id), |
| mIsDefault(true) |
| { |
| } |
| |
| FramebufferGL::~FramebufferGL() |
| { |
| mStateManager->deleteFramebuffer(mFramebufferID); |
| mFramebufferID = 0; |
| } |
| |
| static void BindFramebufferAttachment(const FunctionsGL *functions, |
| GLenum attachmentPoint, |
| const FramebufferAttachment *attachment) |
| { |
| if (attachment) |
| { |
| if (attachment->type() == GL_TEXTURE) |
| { |
| const Texture *texture = attachment->getTexture(); |
| const TextureGL *textureGL = GetImplAs<TextureGL>(texture); |
| |
| if (texture->getTarget() == GL_TEXTURE_2D || |
| texture->getTarget() == GL_TEXTURE_2D_MULTISAMPLE) |
| { |
| functions->framebufferTexture2D(GL_FRAMEBUFFER, attachmentPoint, |
| texture->getTarget(), textureGL->getTextureID(), |
| attachment->mipLevel()); |
| } |
| else if (texture->getTarget() == GL_TEXTURE_CUBE_MAP) |
| { |
| functions->framebufferTexture2D(GL_FRAMEBUFFER, attachmentPoint, attachment->cubeMapFace(), |
| textureGL->getTextureID(), attachment->mipLevel()); |
| } |
| else if (texture->getTarget() == GL_TEXTURE_2D_ARRAY || texture->getTarget() == GL_TEXTURE_3D) |
| { |
| functions->framebufferTextureLayer(GL_FRAMEBUFFER, attachmentPoint, textureGL->getTextureID(), |
| attachment->mipLevel(), attachment->layer()); |
| } |
| else |
| { |
| UNREACHABLE(); |
| } |
| } |
| else if (attachment->type() == GL_RENDERBUFFER) |
| { |
| const Renderbuffer *renderbuffer = attachment->getRenderbuffer(); |
| const RenderbufferGL *renderbufferGL = GetImplAs<RenderbufferGL>(renderbuffer); |
| |
| functions->framebufferRenderbuffer(GL_FRAMEBUFFER, attachmentPoint, GL_RENDERBUFFER, |
| renderbufferGL->getRenderbufferID()); |
| } |
| else |
| { |
| UNREACHABLE(); |
| } |
| } |
| else |
| { |
| // Unbind this attachment |
| functions->framebufferTexture2D(GL_FRAMEBUFFER, attachmentPoint, GL_TEXTURE_2D, 0, 0); |
| } |
| } |
| |
| Error FramebufferGL::discard(size_t count, const GLenum *attachments) |
| { |
| // glInvalidateFramebuffer accepts the same enums as glDiscardFramebufferEXT |
| return invalidate(count, attachments); |
| } |
| |
| Error FramebufferGL::invalidate(size_t count, const GLenum *attachments) |
| { |
| const GLenum *finalAttachmentsPtr = attachments; |
| |
| std::vector<GLenum> modifiedAttachments; |
| if (modifyInvalidateAttachmentsForEmulatedDefaultFBO(count, attachments, &modifiedAttachments)) |
| { |
| finalAttachmentsPtr = modifiedAttachments.data(); |
| } |
| |
| // Since this function is just a hint, only call a native function if it exists. |
| if (mFunctions->invalidateFramebuffer) |
| { |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->invalidateFramebuffer(GL_FRAMEBUFFER, static_cast<GLsizei>(count), |
| finalAttachmentsPtr); |
| } |
| else if (mFunctions->discardFramebuffer) |
| { |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->discardFramebuffer(GL_FRAMEBUFFER, static_cast<GLsizei>(count), |
| finalAttachmentsPtr); |
| } |
| |
| return gl::NoError(); |
| } |
| |
| Error FramebufferGL::invalidateSub(size_t count, |
| const GLenum *attachments, |
| const gl::Rectangle &area) |
| { |
| |
| const GLenum *finalAttachmentsPtr = attachments; |
| |
| std::vector<GLenum> modifiedAttachments; |
| if (modifyInvalidateAttachmentsForEmulatedDefaultFBO(count, attachments, &modifiedAttachments)) |
| { |
| finalAttachmentsPtr = modifiedAttachments.data(); |
| } |
| |
| // Since this function is just a hint and not available until OpenGL 4.3, only call it if it is available. |
| if (mFunctions->invalidateSubFramebuffer) |
| { |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->invalidateSubFramebuffer(GL_FRAMEBUFFER, static_cast<GLsizei>(count), |
| finalAttachmentsPtr, area.x, area.y, area.width, |
| area.height); |
| } |
| |
| return NoError(); |
| } |
| |
| Error FramebufferGL::clear(ContextImpl *context, GLbitfield mask) |
| { |
| syncClearState(context, mask); |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->clear(mask); |
| |
| return NoError(); |
| } |
| |
| Error FramebufferGL::clearBufferfv(ContextImpl *context, |
| GLenum buffer, |
| GLint drawbuffer, |
| const GLfloat *values) |
| { |
| syncClearBufferState(context, buffer, drawbuffer); |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->clearBufferfv(buffer, drawbuffer, values); |
| |
| return NoError(); |
| } |
| |
| Error FramebufferGL::clearBufferuiv(ContextImpl *context, |
| GLenum buffer, |
| GLint drawbuffer, |
| const GLuint *values) |
| { |
| syncClearBufferState(context, buffer, drawbuffer); |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->clearBufferuiv(buffer, drawbuffer, values); |
| |
| return NoError(); |
| } |
| |
| Error FramebufferGL::clearBufferiv(ContextImpl *context, |
| GLenum buffer, |
| GLint drawbuffer, |
| const GLint *values) |
| { |
| syncClearBufferState(context, buffer, drawbuffer); |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->clearBufferiv(buffer, drawbuffer, values); |
| |
| return NoError(); |
| } |
| |
| Error FramebufferGL::clearBufferfi(ContextImpl *context, |
| GLenum buffer, |
| GLint drawbuffer, |
| GLfloat depth, |
| GLint stencil) |
| { |
| syncClearBufferState(context, buffer, drawbuffer); |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->clearBufferfi(buffer, drawbuffer, depth, stencil); |
| |
| return NoError(); |
| } |
| |
| GLenum FramebufferGL::getImplementationColorReadFormat() const |
| { |
| const auto *readAttachment = mState.getReadAttachment(); |
| const Format &format = readAttachment->getFormat(); |
| return format.info->getReadPixelsFormat(); |
| } |
| |
| GLenum FramebufferGL::getImplementationColorReadType() const |
| { |
| const auto *readAttachment = mState.getReadAttachment(); |
| const Format &format = readAttachment->getFormat(); |
| return format.info->getReadPixelsType(); |
| } |
| |
| Error FramebufferGL::readPixels(ContextImpl *context, |
| const gl::Rectangle &area, |
| GLenum format, |
| GLenum type, |
| GLvoid *pixels) const |
| { |
| // TODO: don't sync the pixel pack state here once the dirty bits contain the pixel pack buffer |
| // binding |
| const PixelPackState &packState = context->getGLState().getPackState(); |
| mStateManager->setPixelPackState(packState); |
| |
| nativegl::ReadPixelsFormat readPixelsFormat = |
| nativegl::GetReadPixelsFormat(mFunctions, mWorkarounds, format, type); |
| GLenum readFormat = readPixelsFormat.format; |
| GLenum readType = readPixelsFormat.type; |
| |
| mStateManager->bindFramebuffer(GL_READ_FRAMEBUFFER, mFramebufferID); |
| |
| if (mWorkarounds.packOverlappingRowsSeparatelyPackBuffer && packState.pixelBuffer.get() && |
| packState.rowLength != 0 && packState.rowLength < area.width) |
| { |
| return readPixelsRowByRowWorkaround(area, readFormat, readType, packState, pixels); |
| } |
| |
| if (mWorkarounds.packLastRowSeparatelyForPaddingInclusion) |
| { |
| gl::Extents size(area.width, area.height, 1); |
| |
| bool apply; |
| ANGLE_TRY_RESULT(ShouldApplyLastRowPaddingWorkaround(size, packState, readFormat, readType, |
| false, pixels), |
| apply); |
| |
| if (apply) |
| { |
| return readPixelsPaddingWorkaround(area, readFormat, readType, packState, pixels); |
| } |
| } |
| |
| mFunctions->readPixels(area.x, area.y, area.width, area.height, readFormat, readType, pixels); |
| |
| return gl::NoError(); |
| } |
| |
| Error FramebufferGL::blit(ContextImpl *context, |
| const gl::Rectangle &sourceArea, |
| const gl::Rectangle &destArea, |
| GLbitfield mask, |
| GLenum filter) |
| { |
| const Framebuffer *sourceFramebuffer = context->getGLState().getReadFramebuffer(); |
| const Framebuffer *destFramebuffer = context->getGLState().getDrawFramebuffer(); |
| |
| const FramebufferAttachment *colorReadAttachment = sourceFramebuffer->getReadColorbuffer(); |
| |
| GLsizei readAttachmentSamples = 0; |
| if (colorReadAttachment != nullptr) |
| { |
| readAttachmentSamples = colorReadAttachment->getSamples(); |
| } |
| |
| bool needManualColorBlit = false; |
| |
| // TODO(cwallez) when the filter is LINEAR and both source and destination are SRGB, we |
| // could avoid doing a manual blit. |
| |
| // Prior to OpenGL 4.4 BlitFramebuffer (section 18.3.1 of GL 4.3 core profile) reads: |
| // When values are taken from the read buffer, no linearization is performed, even |
| // if the format of the buffer is SRGB. |
| // Starting from OpenGL 4.4 (section 18.3.1) it reads: |
| // When values are taken from the read buffer, if FRAMEBUFFER_SRGB is enabled and the |
| // value of FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING for the framebuffer attachment |
| // corresponding to the read buffer is SRGB, the red, green, and blue components are |
| // converted from the non-linear sRGB color space according [...]. |
| { |
| bool sourceSRGB = colorReadAttachment != nullptr && |
| colorReadAttachment->getColorEncoding() == GL_SRGB; |
| needManualColorBlit = |
| needManualColorBlit || (sourceSRGB && mFunctions->isAtMostGL(gl::Version(4, 3))); |
| } |
| |
| // Prior to OpenGL 4.2 BlitFramebuffer (section 4.3.2 of GL 4.1 core profile) reads: |
| // Blit operations bypass the fragment pipeline. The only fragment operations which |
| // affect a blit are the pixel ownership test and scissor test. |
| // Starting from OpenGL 4.2 (section 4.3.2) it reads: |
| // When values are written to the draw buffers, blit operations bypass the fragment |
| // pipeline. The only fragment operations which affect a blit are the pixel ownership |
| // test, the scissor test and sRGB conversion. |
| if (!needManualColorBlit) |
| { |
| bool destSRGB = false; |
| for (size_t i = 0; i < destFramebuffer->getDrawbufferStateCount(); ++i) |
| { |
| const FramebufferAttachment *attachment = destFramebuffer->getDrawBuffer(i); |
| if (attachment && attachment->getColorEncoding() == GL_SRGB) |
| { |
| destSRGB = true; |
| break; |
| } |
| } |
| |
| needManualColorBlit = |
| needManualColorBlit || (destSRGB && mFunctions->isAtMostGL(gl::Version(4, 1))); |
| } |
| |
| // Enable FRAMEBUFFER_SRGB if needed |
| mStateManager->setFramebufferSRGBEnabledForFramebuffer(context->getContextState(), true, this); |
| |
| GLenum blitMask = mask; |
| if (needManualColorBlit && (mask & GL_COLOR_BUFFER_BIT) && readAttachmentSamples <= 1) |
| { |
| ANGLE_TRY(mBlitter->blitColorBufferWithShader(sourceFramebuffer, destFramebuffer, |
| sourceArea, destArea, filter)); |
| blitMask &= ~GL_COLOR_BUFFER_BIT; |
| } |
| |
| if (blitMask == 0) |
| { |
| return gl::NoError(); |
| } |
| |
| const FramebufferGL *sourceFramebufferGL = GetImplAs<FramebufferGL>(sourceFramebuffer); |
| mStateManager->bindFramebuffer(GL_READ_FRAMEBUFFER, sourceFramebufferGL->getFramebufferID()); |
| mStateManager->bindFramebuffer(GL_DRAW_FRAMEBUFFER, mFramebufferID); |
| |
| mFunctions->blitFramebuffer(sourceArea.x, sourceArea.y, sourceArea.x1(), sourceArea.y1(), |
| destArea.x, destArea.y, destArea.x1(), destArea.y1(), blitMask, |
| filter); |
| |
| return gl::NoError(); |
| } |
| |
| gl::Error FramebufferGL::getSamplePosition(size_t index, GLfloat *xy) const |
| { |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| mFunctions->getMultisamplefv(GL_SAMPLE_POSITION, static_cast<GLuint>(index), xy); |
| return gl::NoError(); |
| } |
| |
| bool FramebufferGL::checkStatus() const |
| { |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| GLenum status = mFunctions->checkFramebufferStatus(GL_FRAMEBUFFER); |
| if (status != GL_FRAMEBUFFER_COMPLETE) |
| { |
| WARN() << "GL framebuffer returned incomplete."; |
| } |
| return (status == GL_FRAMEBUFFER_COMPLETE); |
| } |
| |
| void FramebufferGL::syncState(ContextImpl *contextImpl, const Framebuffer::DirtyBits &dirtyBits) |
| { |
| // Don't need to sync state for the default FBO. |
| if (mIsDefault) |
| { |
| return; |
| } |
| |
| mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID); |
| |
| for (auto dirtyBit : angle::IterateBitSet(dirtyBits)) |
| { |
| switch (dirtyBit) |
| { |
| case Framebuffer::DIRTY_BIT_DEPTH_ATTACHMENT: |
| BindFramebufferAttachment(mFunctions, GL_DEPTH_ATTACHMENT, |
| mState.getDepthAttachment()); |
| break; |
| case Framebuffer::DIRTY_BIT_STENCIL_ATTACHMENT: |
| BindFramebufferAttachment(mFunctions, GL_STENCIL_ATTACHMENT, |
| mState.getStencilAttachment()); |
| break; |
| case Framebuffer::DIRTY_BIT_DRAW_BUFFERS: |
| { |
| const auto &drawBuffers = mState.getDrawBufferStates(); |
| mFunctions->drawBuffers(static_cast<GLsizei>(drawBuffers.size()), |
| drawBuffers.data()); |
| break; |
| } |
| case Framebuffer::DIRTY_BIT_READ_BUFFER: |
| mFunctions->readBuffer(mState.getReadBufferState()); |
| break; |
| case Framebuffer::DIRTY_BIT_DEFAULT_WIDTH: |
| mFunctions->framebufferParameteri(GL_FRAMEBUFFER, GL_FRAMEBUFFER_DEFAULT_WIDTH, |
| mState.getDefaultWidth()); |
| break; |
| case Framebuffer::DIRTY_BIT_DEFAULT_HEIGHT: |
| mFunctions->framebufferParameteri(GL_FRAMEBUFFER, GL_FRAMEBUFFER_DEFAULT_HEIGHT, |
| mState.getDefaultHeight()); |
| break; |
| case Framebuffer::DIRTY_BIT_DEFAULT_SAMPLES: |
| mFunctions->framebufferParameteri(GL_FRAMEBUFFER, GL_FRAMEBUFFER_DEFAULT_SAMPLES, |
| mState.getDefaultSamples()); |
| break; |
| case Framebuffer::DIRTY_BIT_DEFAULT_FIXED_SAMPLE_LOCATIONS: |
| mFunctions->framebufferParameteri(GL_FRAMEBUFFER, |
| GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS, |
| mState.getDefaultFixedSampleLocations()); |
| break; |
| default: |
| { |
| ASSERT(Framebuffer::DIRTY_BIT_COLOR_ATTACHMENT_0 == 0 && |
| dirtyBit < Framebuffer::DIRTY_BIT_COLOR_ATTACHMENT_MAX); |
| size_t index = |
| static_cast<size_t>(dirtyBit - Framebuffer::DIRTY_BIT_COLOR_ATTACHMENT_0); |
| BindFramebufferAttachment(mFunctions, |
| static_cast<GLenum>(GL_COLOR_ATTACHMENT0 + index), |
| mState.getColorAttachment(index)); |
| break; |
| } |
| } |
| } |
| } |
| |
| GLuint FramebufferGL::getFramebufferID() const |
| { |
| return mFramebufferID; |
| } |
| |
| bool FramebufferGL::isDefault() const |
| { |
| return mIsDefault; |
| } |
| |
| void FramebufferGL::syncClearState(ContextImpl *context, GLbitfield mask) |
| { |
| if (mFunctions->standard == STANDARD_GL_DESKTOP) |
| { |
| if (mWorkarounds.doesSRGBClearsOnLinearFramebufferAttachments && |
| (mask & GL_COLOR_BUFFER_BIT) != 0 && !mIsDefault) |
| { |
| bool hasSRGBAttachment = false; |
| for (const auto &attachment : mState.getColorAttachments()) |
| { |
| if (attachment.isAttached() && attachment.getColorEncoding() == GL_SRGB) |
| { |
| hasSRGBAttachment = true; |
| break; |
| } |
| } |
| |
| mStateManager->setFramebufferSRGBEnabled(context->getContextState(), hasSRGBAttachment); |
| } |
| else |
| { |
| mStateManager->setFramebufferSRGBEnabled(context->getContextState(), !mIsDefault); |
| } |
| } |
| } |
| |
| void FramebufferGL::syncClearBufferState(ContextImpl *context, GLenum buffer, GLint drawBuffer) |
| { |
| if (mFunctions->standard == STANDARD_GL_DESKTOP) |
| { |
| if (mWorkarounds.doesSRGBClearsOnLinearFramebufferAttachments && buffer == GL_COLOR && |
| !mIsDefault) |
| { |
| // If doing a clear on a color buffer, set SRGB blend enabled only if the color buffer |
| // is an SRGB format. |
| const auto &drawbufferState = mState.getDrawBufferStates(); |
| const auto &colorAttachments = mState.getColorAttachments(); |
| |
| const FramebufferAttachment *attachment = nullptr; |
| if (drawbufferState[drawBuffer] >= GL_COLOR_ATTACHMENT0 && |
| drawbufferState[drawBuffer] < GL_COLOR_ATTACHMENT0 + colorAttachments.size()) |
| { |
| size_t attachmentIdx = |
| static_cast<size_t>(drawbufferState[drawBuffer] - GL_COLOR_ATTACHMENT0); |
| attachment = &colorAttachments[attachmentIdx]; |
| } |
| |
| if (attachment != nullptr) |
| { |
| mStateManager->setFramebufferSRGBEnabled(context->getContextState(), |
| attachment->getColorEncoding() == GL_SRGB); |
| } |
| } |
| else |
| { |
| mStateManager->setFramebufferSRGBEnabled(context->getContextState(), !mIsDefault); |
| } |
| } |
| } |
| |
| bool FramebufferGL::modifyInvalidateAttachmentsForEmulatedDefaultFBO( |
| size_t count, |
| const GLenum *attachments, |
| std::vector<GLenum> *modifiedAttachments) const |
| { |
| bool needsModification = mIsDefault && mFramebufferID != 0; |
| if (!needsModification) |
| { |
| return false; |
| } |
| |
| modifiedAttachments->resize(count); |
| for (size_t i = 0; i < count; i++) |
| { |
| switch (attachments[i]) |
| { |
| case GL_COLOR: |
| (*modifiedAttachments)[i] = GL_COLOR_ATTACHMENT0; |
| break; |
| |
| case GL_DEPTH: |
| (*modifiedAttachments)[i] = GL_DEPTH_ATTACHMENT; |
| break; |
| |
| case GL_STENCIL: |
| (*modifiedAttachments)[i] = GL_STENCIL_ATTACHMENT; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| gl::Error FramebufferGL::readPixelsRowByRowWorkaround(const gl::Rectangle &area, |
| GLenum format, |
| GLenum type, |
| const gl::PixelPackState &pack, |
| GLvoid *pixels) const |
| { |
| intptr_t offset = reinterpret_cast<intptr_t>(pixels); |
| |
| const gl::InternalFormat &glFormat = |
| gl::GetInternalFormatInfo(gl::GetSizedInternalFormat(format, type)); |
| GLuint rowBytes = 0; |
| ANGLE_TRY_RESULT(glFormat.computeRowPitch(type, area.width, pack.alignment, pack.rowLength), |
| rowBytes); |
| GLuint skipBytes = 0; |
| ANGLE_TRY_RESULT(glFormat.computeSkipBytes(rowBytes, 0, pack, false), skipBytes); |
| |
| gl::PixelPackState directPack; |
| directPack.pixelBuffer = pack.pixelBuffer; |
| directPack.alignment = 1; |
| mStateManager->setPixelPackState(directPack); |
| directPack.pixelBuffer.set(nullptr); |
| |
| offset += skipBytes; |
| for (GLint row = 0; row < area.height; ++row) |
| { |
| mFunctions->readPixels(area.x, row + area.y, area.width, 1, format, type, |
| reinterpret_cast<GLvoid *>(offset)); |
| offset += row * rowBytes; |
| } |
| |
| return gl::NoError(); |
| } |
| |
| gl::Error FramebufferGL::readPixelsPaddingWorkaround(const gl::Rectangle &area, |
| GLenum format, |
| GLenum type, |
| const gl::PixelPackState &pack, |
| GLvoid *pixels) const |
| { |
| const gl::InternalFormat &glFormat = |
| gl::GetInternalFormatInfo(gl::GetSizedInternalFormat(format, type)); |
| GLuint rowBytes = 0; |
| ANGLE_TRY_RESULT(glFormat.computeRowPitch(type, area.width, pack.alignment, pack.rowLength), |
| rowBytes); |
| GLuint skipBytes = 0; |
| ANGLE_TRY_RESULT(glFormat.computeSkipBytes(rowBytes, 0, pack, false), skipBytes); |
| |
| // Get all by the last row |
| if (area.height > 1) |
| { |
| mFunctions->readPixels(area.x, area.y, area.width, area.height - 1, format, type, pixels); |
| } |
| |
| // Get the last row manually |
| gl::PixelPackState directPack; |
| directPack.pixelBuffer = pack.pixelBuffer; |
| directPack.alignment = 1; |
| mStateManager->setPixelPackState(directPack); |
| directPack.pixelBuffer.set(nullptr); |
| |
| intptr_t lastRowOffset = |
| reinterpret_cast<intptr_t>(pixels) + skipBytes + (area.height - 1) * rowBytes; |
| mFunctions->readPixels(area.x, area.y + area.height - 1, area.width, 1, format, type, |
| reinterpret_cast<GLvoid *>(lastRowOffset)); |
| |
| return gl::NoError(); |
| } |
| } // namespace rx |
