Move Context draw call logic into RendererD3D.
Also move a lot of supporting code.
BUG=angle:789
Change-Id: I098bf7d072ece1f414605783c32ec5354ba63e19
Reviewed-on: https://chromium-review.googlesource.com/226061
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
diff --git a/src/libGLESv2/Context.cpp b/src/libGLESv2/Context.cpp
index 558d3ce..8ada58c 100644
--- a/src/libGLESv2/Context.cpp
+++ b/src/libGLESv2/Context.cpp
@@ -35,7 +35,6 @@
#include <iterator>
// TODO(jmadill): phase these out
-#include "libGLESv2/renderer/d3d/IndexDataManager.h"
#include "libGLESv2/renderer/d3d/RendererD3D.h"
namespace gl
@@ -1301,324 +1300,6 @@
return false;
}
-// Applies the render target surface, depth stencil surface, viewport rectangle and
-// scissor rectangle to the renderer
-Error Context::applyRenderTarget(GLenum drawMode, bool ignoreViewport)
-{
- Framebuffer *framebufferObject = mState.getDrawFramebuffer();
- ASSERT(framebufferObject && framebufferObject->completeness(getData()) == GL_FRAMEBUFFER_COMPLETE);
-
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- gl::Error error = rendererD3D->applyRenderTarget(framebufferObject);
- if (error.isError())
- {
- return error;
- }
-
- float nearZ, farZ;
- mState.getDepthRange(&nearZ, &farZ);
- rendererD3D->setViewport(mState.getViewport(), nearZ, farZ, drawMode,
- mState.getRasterizerState().frontFace, ignoreViewport);
-
- rendererD3D->setScissorRectangle(mState.getScissor(), mState.isScissorTestEnabled());
-
- return gl::Error(GL_NO_ERROR);
-}
-
-// Applies the fixed-function state (culling, depth test, alpha blending, stenciling, etc) to the Direct3D 9 device
-Error Context::applyState(GLenum drawMode)
-{
- Framebuffer *framebufferObject = mState.getDrawFramebuffer();
- int samples = framebufferObject->getSamples(getData());
-
- RasterizerState rasterizer = mState.getRasterizerState();
- rasterizer.pointDrawMode = (drawMode == GL_POINTS);
- rasterizer.multiSample = (samples != 0);
-
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- Error error = rendererD3D->setRasterizerState(rasterizer);
- if (error.isError())
- {
- return error;
- }
-
- unsigned int mask = 0;
- if (mState.isSampleCoverageEnabled())
- {
- GLclampf coverageValue;
- bool coverageInvert = false;
- mState.getSampleCoverageParams(&coverageValue, &coverageInvert);
- if (coverageValue != 0)
- {
- float threshold = 0.5f;
-
- for (int i = 0; i < samples; ++i)
- {
- mask <<= 1;
-
- if ((i + 1) * coverageValue >= threshold)
- {
- threshold += 1.0f;
- mask |= 1;
- }
- }
- }
-
- if (coverageInvert)
- {
- mask = ~mask;
- }
- }
- else
- {
- mask = 0xFFFFFFFF;
- }
- error = rendererD3D->setBlendState(framebufferObject, mState.getBlendState(), mState.getBlendColor(), mask);
- if (error.isError())
- {
- return error;
- }
-
- error = rendererD3D->setDepthStencilState(mState.getDepthStencilState(), mState.getStencilRef(),
- mState.getStencilBackRef(), rasterizer.frontFace == GL_CCW);
- if (error.isError())
- {
- return error;
- }
-
- return Error(GL_NO_ERROR);
-}
-
-// Applies the shaders and shader constants to the Direct3D 9 device
-Error Context::applyShaders(ProgramBinary *programBinary, bool transformFeedbackActive)
-{
- VertexFormat inputLayout[MAX_VERTEX_ATTRIBS];
- VertexFormat::GetInputLayout(inputLayout, programBinary, mState);
-
- const Framebuffer *fbo = mState.getDrawFramebuffer();
-
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- Error error = rendererD3D->applyShaders(programBinary, inputLayout, fbo,
- mState.getRasterizerState().rasterizerDiscard,
- transformFeedbackActive);
- if (error.isError())
- {
- return error;
- }
-
- return programBinary->applyUniforms();
-}
-
-Error Context::generateSwizzles(ProgramBinary *programBinary, SamplerType type)
-{
- size_t samplerRange = programBinary->getUsedSamplerRange(type);
-
- for (size_t i = 0; i < samplerRange; i++)
- {
- GLenum textureType = programBinary->getSamplerTextureType(type, i);
- GLint textureUnit = programBinary->getSamplerMapping(type, i, getCaps());
- if (textureUnit != -1)
- {
- Texture *texture = getSamplerTexture(textureUnit, textureType);
- ASSERT(texture);
- if (texture->getSamplerState().swizzleRequired())
- {
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- Error error = rendererD3D->generateSwizzle(texture);
- if (error.isError())
- {
- return error;
- }
- }
- }
- }
-
- return Error(GL_NO_ERROR);
-}
-
-Error Context::generateSwizzles(ProgramBinary *programBinary)
-{
- Error error = generateSwizzles(programBinary, SAMPLER_VERTEX);
- if (error.isError())
- {
- return error;
- }
-
- error = generateSwizzles(programBinary, SAMPLER_PIXEL);
- if (error.isError())
- {
- return error;
- }
-
- return Error(GL_NO_ERROR);
-}
-
-// For each Direct3D sampler of either the pixel or vertex stage,
-// looks up the corresponding OpenGL texture image unit and texture type,
-// and sets the texture and its addressing/filtering state (or NULL when inactive).
-Error Context::applyTextures(ProgramBinary *programBinary, SamplerType shaderType,
- const FramebufferTextureSerialArray &framebufferSerials, size_t framebufferSerialCount)
-{
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- size_t samplerRange = programBinary->getUsedSamplerRange(shaderType);
- for (size_t samplerIndex = 0; samplerIndex < samplerRange; samplerIndex++)
- {
- GLenum textureType = programBinary->getSamplerTextureType(shaderType, samplerIndex);
- GLint textureUnit = programBinary->getSamplerMapping(shaderType, samplerIndex, getCaps());
- if (textureUnit != -1)
- {
- Texture *texture = getSamplerTexture(textureUnit, textureType);
- ASSERT(texture);
- SamplerState sampler = texture->getSamplerState();
-
- Sampler *samplerObject = mState.getSampler(textureUnit);
- if (samplerObject)
- {
- samplerObject->getState(&sampler);
- }
-
- // TODO: std::binary_search may become unavailable using older versions of GCC
- if (texture->isSamplerComplete(sampler, mTextureCaps, mExtensions, mClientVersion) &&
- !std::binary_search(framebufferSerials.begin(), framebufferSerials.begin() + framebufferSerialCount, texture->getTextureSerial()))
- {
- Error error = rendererD3D->setSamplerState(shaderType, samplerIndex, texture, sampler);
- if (error.isError())
- {
- return error;
- }
-
- error = rendererD3D->setTexture(shaderType, samplerIndex, texture);
- if (error.isError())
- {
- return error;
- }
- }
- else
- {
- // Texture is not sampler complete or it is in use by the framebuffer. Bind the incomplete texture.
- Texture *incompleteTexture = getIncompleteTexture(textureType);
- gl::Error error = rendererD3D->setTexture(shaderType, samplerIndex, incompleteTexture);
- if (error.isError())
- {
- return error;
- }
- }
- }
- else
- {
- // No texture bound to this slot even though it is used by the shader, bind a NULL texture
- Error error = rendererD3D->setTexture(shaderType, samplerIndex, NULL);
- if (error.isError())
- {
- return error;
- }
- }
- }
-
- // Set all the remaining textures to NULL
- size_t samplerCount = (shaderType == SAMPLER_PIXEL) ? mCaps.maxTextureImageUnits
- : mCaps.maxVertexTextureImageUnits;
- for (size_t samplerIndex = samplerRange; samplerIndex < samplerCount; samplerIndex++)
- {
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- Error error = rendererD3D->setTexture(shaderType, samplerIndex, NULL);
- if (error.isError())
- {
- return error;
- }
- }
-
- return Error(GL_NO_ERROR);
-}
-
-Error Context::applyTextures(ProgramBinary *programBinary)
-{
- FramebufferTextureSerialArray framebufferSerials;
- size_t framebufferSerialCount = getBoundFramebufferTextureSerials(&framebufferSerials);
-
- Error error = applyTextures(programBinary, SAMPLER_VERTEX, framebufferSerials, framebufferSerialCount);
- if (error.isError())
- {
- return error;
- }
-
- error = applyTextures(programBinary, SAMPLER_PIXEL, framebufferSerials, framebufferSerialCount);
- if (error.isError())
- {
- return error;
- }
-
- return Error(GL_NO_ERROR);
-}
-
-Error Context::applyUniformBuffers()
-{
- Program *programObject = getProgram(mState.getCurrentProgramId());
- ProgramBinary *programBinary = programObject->getProgramBinary();
-
- std::vector<Buffer*> boundBuffers;
-
- for (unsigned int uniformBlockIndex = 0; uniformBlockIndex < programBinary->getActiveUniformBlockCount(); uniformBlockIndex++)
- {
- GLuint blockBinding = programObject->getUniformBlockBinding(uniformBlockIndex);
-
- if (mState.getIndexedUniformBuffer(blockBinding)->id() == 0)
- {
- // undefined behaviour
- return gl::Error(GL_INVALID_OPERATION, "It is undefined behaviour to have a used but unbound uniform buffer.");
- }
- else
- {
- Buffer *uniformBuffer = mState.getIndexedUniformBuffer(blockBinding);
- ASSERT(uniformBuffer);
- boundBuffers.push_back(uniformBuffer);
- }
- }
-
- return programBinary->applyUniformBuffers(boundBuffers, getCaps());
-}
-
-bool Context::applyTransformFeedbackBuffers()
-{
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- TransformFeedback *curTransformFeedback = mState.getCurrentTransformFeedback();
- if (curTransformFeedback && curTransformFeedback->isStarted() && !curTransformFeedback->isPaused())
- {
- rendererD3D->applyTransformFeedbackBuffers(mState);
- return true;
- }
- else
- {
- return false;
- }
-}
-
-void Context::markTransformFeedbackUsage()
-{
- for (size_t i = 0; i < mCaps.maxTransformFeedbackSeparateAttributes; i++)
- {
- Buffer *buffer = mState.getIndexedTransformFeedbackBuffer(i);
- if (buffer)
- {
- buffer->markTransformFeedbackUsage();
- }
- }
-}
-
Error Context::clear(GLbitfield mask)
{
if (mState.isRasterizerDiscardEnabled())
@@ -1628,7 +1309,11 @@
ClearParameters clearParams = mState.getClearParameters(mask);
- Error error = applyRenderTarget(GL_TRIANGLES, true); // Clips the clear to the scissor rectangle but not the viewport
+ //TODO(jmadill): Renderer refactor
+ rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
+
+ // Clips the clear to the scissor rectangle but not the viewport
+ Error error = rendererD3D->applyRenderTarget(getData(), GL_TRIANGLES, true);
if (error.isError())
{
return error;
@@ -1663,7 +1348,11 @@
clearParams.depthClearValue = values[0];
}
- Error error = applyRenderTarget(GL_TRIANGLES, true); // Clips the clear to the scissor rectangle but not the viewport
+ //TODO(jmadill): Renderer refactor
+ rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
+
+ // Clips the clear to the scissor rectangle but not the viewport
+ Error error = rendererD3D->applyRenderTarget(getData(), GL_TRIANGLES, true);
if (error.isError())
{
return error;
@@ -1688,7 +1377,11 @@
clearParams.colorUIClearValue = ColorUI(values[0], values[1], values[2], values[3]);
clearParams.colorClearType = GL_UNSIGNED_INT;
- Error error = applyRenderTarget(GL_TRIANGLES, true); // Clips the clear to the scissor rectangle but not the viewport
+ //TODO(jmadill): Renderer refactor
+ rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
+
+ // Clips the clear to the scissor rectangle but not the viewport
+ Error error = rendererD3D->applyRenderTarget(getData(), GL_TRIANGLES, true);
if (error.isError())
{
return error;
@@ -1723,7 +1416,11 @@
clearParams.stencilClearValue = values[1];
}
- Error error = applyRenderTarget(GL_TRIANGLES, true); // Clips the clear to the scissor rectangle but not the viewport
+ //TODO(jmadill): Renderer refactor
+ rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
+
+ // Clips the clear to the scissor rectangle but not the viewport
+ Error error = rendererD3D->applyRenderTarget(getData(), GL_TRIANGLES, true);
if (error.isError())
{
return error;
@@ -1746,7 +1443,11 @@
clearParams.clearStencil = true;
clearParams.stencilClearValue = stencil;
- Error error = applyRenderTarget(GL_TRIANGLES, true); // Clips the clear to the scissor rectangle but not the viewport
+ //TODO(jmadill): Renderer refactor
+ rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
+
+ // Clips the clear to the scissor rectangle but not the viewport
+ Error error = rendererD3D->applyRenderTarget(getData(), GL_TRIANGLES, true);
if (error.isError())
{
return error;
@@ -1770,164 +1471,14 @@
Error Context::drawArrays(GLenum mode, GLint first, GLsizei count, GLsizei instances)
{
- ASSERT(mState.getCurrentProgramId() != 0);
-
- ProgramBinary *programBinary = mState.getCurrentProgramBinary();
- programBinary->updateSamplerMapping();
-
- Error error = generateSwizzles(programBinary);
- if (error.isError())
- {
- return error;
- }
-
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- if (!rendererD3D->applyPrimitiveType(mode, count))
- {
- return Error(GL_NO_ERROR);
- }
-
- error = applyRenderTarget(mode, false);
- if (error.isError())
- {
- return error;
- }
-
- error = applyState(mode);
- if (error.isError())
- {
- return error;
- }
-
- error = rendererD3D->applyVertexBuffer(mState, first, count, instances);
- if (error.isError())
- {
- return error;
- }
-
- bool transformFeedbackActive = applyTransformFeedbackBuffers();
-
- error = applyShaders(programBinary, transformFeedbackActive);
- if (error.isError())
- {
- return error;
- }
-
- error = applyTextures(programBinary);
- if (error.isError())
- {
- return error;
- }
-
- error = applyUniformBuffers();
- if (error.isError())
- {
- return error;
- }
-
- if (!skipDraw(mode))
- {
- error = mRenderer->drawArrays(mode, count, instances, transformFeedbackActive);
- if (error.isError())
- {
- return error;
- }
-
- if (transformFeedbackActive)
- {
- markTransformFeedbackUsage();
- }
- }
-
- return gl::Error(GL_NO_ERROR);
+ return mRenderer->drawArrays(getData(), mode, first, count, instances);
}
Error Context::drawElements(GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices, GLsizei instances,
const rx::RangeUI &indexRange)
{
- ASSERT(mState.getCurrentProgramId() != 0);
-
- ProgramBinary *programBinary = mState.getCurrentProgramBinary();
- programBinary->updateSamplerMapping();
-
- Error error = generateSwizzles(programBinary);
- if (error.isError())
- {
- return error;
- }
-
- //TODO(jmadill): MANGLE refactor
- rx::RendererD3D *rendererD3D = rx::RendererD3D::makeRendererD3D(mRenderer);
-
- if (!rendererD3D->applyPrimitiveType(mode, count))
- {
- return Error(GL_NO_ERROR);
- }
-
- error = applyRenderTarget(mode, false);
- if (error.isError())
- {
- return error;
- }
-
- error = applyState(mode);
- if (error.isError())
- {
- return error;
- }
-
- VertexArray *vao = mState.getVertexArray();
- rx::TranslatedIndexData indexInfo;
- indexInfo.indexRange = indexRange;
- error = rendererD3D->applyIndexBuffer(indices, vao->getElementArrayBuffer(), count, mode, type, &indexInfo);
- if (error.isError())
- {
- return error;
- }
-
- GLsizei vertexCount = indexInfo.indexRange.length() + 1;
- error = rendererD3D->applyVertexBuffer(mState, indexInfo.indexRange.start, vertexCount, instances);
- if (error.isError())
- {
- return error;
- }
-
- bool transformFeedbackActive = applyTransformFeedbackBuffers();
- // Transform feedback is not allowed for DrawElements, this error should have been caught at the API validation
- // layer.
- ASSERT(!transformFeedbackActive);
-
- error = applyShaders(programBinary, transformFeedbackActive);
- if (error.isError())
- {
- return error;
- }
-
- error = applyTextures(programBinary);
- if (error.isError())
- {
- return error;
- }
-
- error = applyUniformBuffers();
- if (error.isError())
- {
- return error;
- }
-
- if (!skipDraw(mode))
- {
- error = mRenderer->drawElements(mode, count, type, indices, vao->getElementArrayBuffer(), indexInfo, instances);
- if (error.isError())
- {
- return error;
- }
- }
-
- return Error(GL_NO_ERROR);
+ return mRenderer->drawElements(getData(), mode, count, type, indices, instances, indexRange);
}
// Implements glFlush when block is false, glFinish when block is true
@@ -2104,95 +1655,6 @@
mState.detachSampler(sampler);
}
-Texture *Context::getIncompleteTexture(GLenum type)
-{
- if (mIncompleteTextures.find(type) == mIncompleteTextures.end())
- {
- const GLubyte color[] = { 0, 0, 0, 255 };
- const PixelUnpackState incompleteUnpackState(1);
-
- Texture* t = NULL;
- switch (type)
- {
- default:
- UNREACHABLE();
- // default falls through to TEXTURE_2D
-
- case GL_TEXTURE_2D:
- {
- Texture2D *incomplete2d = new Texture2D(mRenderer->createTexture(GL_TEXTURE_2D), Texture::INCOMPLETE_TEXTURE_ID);
- incomplete2d->setImage(0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- t = incomplete2d;
- }
- break;
-
- case GL_TEXTURE_CUBE_MAP:
- {
- TextureCubeMap *incompleteCube = new TextureCubeMap(mRenderer->createTexture(GL_TEXTURE_CUBE_MAP), Texture::INCOMPLETE_TEXTURE_ID);
-
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
- incompleteCube->setImage(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
-
- t = incompleteCube;
- }
- break;
-
- case GL_TEXTURE_3D:
- {
- Texture3D *incomplete3d = new Texture3D(mRenderer->createTexture(GL_TEXTURE_3D), Texture::INCOMPLETE_TEXTURE_ID);
- incomplete3d->setImage(0, 1, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
-
- t = incomplete3d;
- }
- break;
-
- case GL_TEXTURE_2D_ARRAY:
- {
- Texture2DArray *incomplete2darray = new Texture2DArray(mRenderer->createTexture(GL_TEXTURE_2D_ARRAY), Texture::INCOMPLETE_TEXTURE_ID);
- incomplete2darray->setImage(0, 1, 1, 1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, incompleteUnpackState, color);
-
- t = incomplete2darray;
- }
- break;
- }
-
- mIncompleteTextures[type].set(t);
- }
-
- return mIncompleteTextures[type].get();
-}
-
-bool Context::skipDraw(GLenum drawMode)
-{
- if (drawMode == GL_POINTS)
- {
- // ProgramBinary assumes non-point rendering if gl_PointSize isn't written,
- // which affects varying interpolation. Since the value of gl_PointSize is
- // undefined when not written, just skip drawing to avoid unexpected results.
- if (!mState.getCurrentProgramBinary()->usesPointSize())
- {
- // This is stictly speaking not an error, but developers should be
- // notified of risking undefined behavior.
- ERR("Point rendering without writing to gl_PointSize.");
-
- return true;
- }
- }
- else if (IsTriangleMode(drawMode))
- {
- if (mState.getRasterizerState().cullFace && mState.getRasterizerState().cullMode == GL_FRONT_AND_BACK)
- {
- return true;
- }
- }
-
- return false;
-}
-
void Context::setVertexAttribDivisor(GLuint index, GLuint divisor)
{
mState.getVertexArray()->setVertexAttribDivisor(index, divisor);
@@ -2325,33 +1787,6 @@
return mExtensionStrings.size();
}
-size_t Context::getBoundFramebufferTextureSerials(FramebufferTextureSerialArray *outSerialArray)
-{
- size_t serialCount = 0;
-
- Framebuffer *drawFramebuffer = mState.getDrawFramebuffer();
- for (unsigned int i = 0; i < IMPLEMENTATION_MAX_DRAW_BUFFERS; i++)
- {
- FramebufferAttachment *attachment = drawFramebuffer->getColorbuffer(i);
- if (attachment && attachment->isTexture())
- {
- Texture *texture = attachment->getTexture();
- (*outSerialArray)[serialCount++] = texture->getTextureSerial();
- }
- }
-
- FramebufferAttachment *depthStencilAttachment = drawFramebuffer->getDepthOrStencilbuffer();
- if (depthStencilAttachment && depthStencilAttachment->isTexture())
- {
- Texture *depthStencilTexture = depthStencilAttachment->getTexture();
- (*outSerialArray)[serialCount++] = depthStencilTexture->getTextureSerial();
- }
-
- std::sort(outSerialArray->begin(), outSerialArray->begin() + serialCount);
-
- return serialCount;
-}
-
Error Context::blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{