bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
GrGLenum format,
GrGLenum type) const {
if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
// ES 2 guarantees this format is supported
return true;
}
if (!fTwoFormatLimit) {
// not limited by ES 2's constraints
return true;
}
GrGLint otherFormat = GR_GL_RGBA;
GrGLint otherType = GR_GL_UNSIGNED_BYTE;
// The other supported format/type combo supported for ReadPixels
// can change based on which render target is bound
GR_GL_GetIntegerv(intf,
GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
&otherFormat);
GR_GL_GetIntegerv(intf,
GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
&otherType);
return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
}
GrBackendRenderTargetDesc SkGLWidget::getDesc(int w, int h) {
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(this->width());
desc.fHeight = SkScalarRoundToInt(this->height());
desc.fConfig = kSkia8888_GrPixelConfig;
GR_GL_GetIntegerv(fCurIntf, GR_GL_SAMPLES, &desc.fSampleCnt);
GR_GL_GetIntegerv(fCurIntf, GR_GL_STENCIL_BITS, &desc.fStencilBits);
GrGLint buffer;
GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer);
desc.fRenderTargetHandle = buffer;
return desc;
}
void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo) {
fMSFBOType = kNone_MSFBOType;
if (kDesktop_GrGLBinding != ctxInfo.binding()) {
if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
// chrome's extension is equivalent to the EXT msaa
// and fbo_blit extensions.
fMSFBOType = kDesktopEXT_MSFBOType;
} else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
fMSFBOType = kAppleES_MSFBOType;
}
} else {
if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
fMSFBOType = GrGLCaps::kDesktopARB_MSFBOType;
} else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
fMSFBOType = GrGLCaps::kDesktopEXT_MSFBOType;
}
// TODO: We could populate fMSAACoverageModes using GetInternalformativ
// on GL 4.2+. It's format-specific, though. See also
// http://code.google.com/p/skia/issues/detail?id=470 about using actual
// rather than requested sample counts in cache key.
if (ctxInfo.hasExtension("GL_NV_framebuffer_multisample_coverage")) {
fCoverageAAType = kNVDesktop_CoverageAAType;
GrGLint count;
GR_GL_GetIntegerv(ctxInfo.interface(),
GR_GL_MAX_MULTISAMPLE_COVERAGE_MODES,
&count);
fMSAACoverageModes.setCount(count);
GR_GL_GetIntegerv(ctxInfo.interface(),
GR_GL_MULTISAMPLE_COVERAGE_MODES,
(int*)&fMSAACoverageModes[0]);
// The NV driver seems to return the modes already sorted but the
// spec doesn't require this. So we sort.
SkQSortCompareProc compareProc =
reinterpret_cast<SkQSortCompareProc>(&coverage_mode_compare);
SkQSort(&fMSAACoverageModes[0],
count,
sizeof(MSAACoverageMode),
compareProc);
}
}
if (kNone_MSFBOType != fMSFBOType) {
GR_GL_GetIntegerv(ctxInfo.interface(),
GR_GL_MAX_SAMPLES,
&fMaxSampleCount);
}
}
GrGpuGLShaders::GrGpuGLShaders(const GrGLContextInfo& ctxInfo)
: GrGpuGL(ctxInfo) {
// Enable supported shader-related caps
if (kDesktop_GrGLBinding == this->glBinding()) {
fCaps.fDualSourceBlendingSupport =
this->glVersion() >= GR_GL_VER(3,3) ||
this->hasExtension("GL_ARB_blend_func_extended");
fCaps.fShaderDerivativeSupport = true;
// we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
fCaps.fGeometryShaderSupport =
this->glVersion() >= GR_GL_VER(3,2) &&
this->glslGeneration() >= k150_GrGLSLGeneration;
} else {
fCaps.fShaderDerivativeSupport =
this->hasExtension("GL_OES_standard_derivatives");
}
GR_GL_GetIntegerv(this->glInterface(),
GR_GL_MAX_VERTEX_ATTRIBS,
&fMaxVertexAttribs);
fProgramData = NULL;
fProgramCache = new ProgramCache(this->glContextInfo());
#if 0
this->programUnitTest();
#endif
}
GrGpuGLShaders::GrGpuGLShaders(const GrGLInterface* gl)
: GrGpuGL(gl, get_binding_in_use(gl)) {
GrGLSLGeneration glslGeneration =
GetGLSLGeneration(this->glBinding(), gl);
// Enable supported shader-releated caps
fCaps.fShaderSupport = true;
fCaps.fSupportPerVertexCoverage = true;
if (kDesktop_GrGLBinding == this->glBinding()) {
fCaps.fDualSourceBlendingSupport =
this->glVersion() >= GR_GL_VER(3,3) ||
this->hasExtension("GL_ARB_blend_func_extended");
fCaps.fShaderDerivativeSupport = true;
// we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
fCaps.fGeometryShaderSupport =
this->glVersion() >= GR_GL_VER(3,2) &&
glslGeneration >= k150_GLSLGeneration;
} else {
fCaps.fShaderDerivativeSupport =
this->hasExtension("GL_OES_standard_derivatives");
}
GR_GL_GetIntegerv(gl, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttribs);
fProgramData = NULL;
fProgramCache = new ProgramCache(gl, glslGeneration);
#if 0
this->programUnitTest();
#endif
}
void SkV8ExampleWindow::windowSizeChanged() {
if (FLAGS_gpu) {
SkOSWindow::AttachmentInfo attachmentInfo;
bool result = this->attach(
SkOSWindow::kNativeGL_BackEndType, 0, false, &attachmentInfo);
if (!result) {
printf("Failed to attach.");
exit(1);
}
fCurIntf = GrGLCreateNativeInterface();
fCurContext = GrContext::Create(
kOpenGL_GrBackend, (GrBackendContext) fCurIntf);
if (NULL == fCurIntf || NULL == fCurContext) {
printf("Failed to initialize GL.");
exit(1);
}
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(this->width());
desc.fHeight = SkScalarRoundToInt(this->height());
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fSampleCnt = attachmentInfo.fSampleCount;
desc.fStencilBits = attachmentInfo.fStencilBits;
GrGLint buffer;
GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer);
desc.fRenderTargetHandle = buffer;
SkSafeUnref(fCurSurface);
fCurSurface = SkSurface::MakeFromBackendRenderTarget(fCurContext, desc,
nullptr, nullptr).release();
}
}
sk_sp<SkSurface>
SkSurface_Compute::MakeComputeBackedSurface(SkWindow * const window,
const SkWindow::AttachmentInfo & attachmentInfo,
GrGLInterface const * const grInterface,
GrContext * const grContext,
sk_sp<SkContext_Compute> compute)
{
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(window->width());
desc.fHeight = SkScalarRoundToInt(window->height());
if (0 == desc.fWidth || 0 == desc.fHeight) {
return nullptr;
}
// TODO: Query the actual framebuffer for sRGB capable. However, to
// preserve old (fake-linear) behavior, we don't do this. Instead, rely
// on the flag (currently driven via 'C' mode in SampleApp).
//
// Also, we may not have real sRGB support (ANGLE, in particular), so check for
// that, and fall back to L32:
//
// ... and, if we're using a 10-bit/channel FB0, it doesn't do sRGB conversion on write,
// so pretend that it's non-sRGB 8888:
desc.fConfig =
grContext->caps()->srgbSupport() &&
SkImageInfoIsGammaCorrect(window->info()) &&
(attachmentInfo.fColorBits != 30)
? kSkiaGamma8888_GrPixelConfig : kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fSampleCnt = 0; // attachmentInfo.fSampleCount;
desc.fStencilBits = 0; // attachmentInfo.fStencilBits;
GrGLint buffer;
GR_GL_GetIntegerv(grInterface,GR_GL_FRAMEBUFFER_BINDING,&buffer);
desc.fRenderTargetHandle = buffer;
sk_sp<SkColorSpace> colorSpace =
grContext->caps()->srgbSupport() && SkImageInfoIsGammaCorrect(window->info())
? SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named) : nullptr;
//
//
//
if (!grContext) {
return nullptr;
}
if (!SkSurface_Gpu::Valid(grContext,desc.fConfig,colorSpace.get())) {
return nullptr;
}
return sk_make_sp<SkSurface_Compute>(compute,desc.fWidth,desc.fHeight);
}
GrRenderTarget* SkWindow::renderTarget(const AttachmentInfo& attachmentInfo,
const GrGLInterface* interface, GrContext* grContext) {
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(this->width());
desc.fHeight = SkScalarRoundToInt(this->height());
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fSampleCnt = attachmentInfo.fSampleCount;
desc.fStencilBits = attachmentInfo.fStencilBits;
GrGLint buffer;
GR_GL_GetIntegerv(interface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
desc.fRenderTargetHandle = buffer;
return grContext->textureProvider()->wrapBackendRenderTarget(desc);
}
void SkExampleWindow::setupRenderTarget() {
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(width());
desc.fHeight = SkScalarRoundToInt(height());
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fSampleCnt = fAttachmentInfo.fSampleCount;
desc.fStencilBits = fAttachmentInfo.fStencilBits;
GrGLint buffer;
GR_GL_GetIntegerv(fInterface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
desc.fRenderTargetHandle = buffer;
fRenderTarget = fContext->wrapBackendRenderTarget(desc);
fContext->setRenderTarget(fRenderTarget);
}
GrRenderTarget* SkWindow::renderTarget(const AttachmentInfo& attachmentInfo,
const GrGLInterface* interface, GrContext* grContext) {
GrBackendRenderTargetDesc desc;
desc.fWidth = SkScalarRoundToInt(this->width());
desc.fHeight = SkScalarRoundToInt(this->height());
// TODO: Query the actual framebuffer for sRGB capable. However, to
// preserve old (fake-linear) behavior, we don't do this. Instead, rely
// on the flag (currently driven via 'C' mode in SampleApp).
//
// Also, we may not have real sRGB support (ANGLE, in particular), so check for
// that, and fall back to L32:
desc.fConfig = grContext->caps()->srgbSupport() && SkImageInfoIsGammaCorrect(info())
? kSkiaGamma8888_GrPixelConfig
: kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fSampleCnt = attachmentInfo.fSampleCount;
desc.fStencilBits = attachmentInfo.fStencilBits;
GrGLint buffer;
GR_GL_GetIntegerv(interface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
desc.fRenderTargetHandle = buffer;
return grContext->textureProvider()->wrapBackendRenderTarget(desc);
}
void GrGLCaps::init(const GrGLContextInfo& ctxInfo) {
this->reset();
if (!ctxInfo.isInitialized()) {
return;
}
const GrGLInterface* gli = ctxInfo.interface();
GrGLBinding binding = ctxInfo.binding();
GrGLVersion version = ctxInfo.version();
if (kES2_GrGLBinding == binding) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
&fMaxFragmentUniformVectors);
} else {
GrAssert(kDesktop_GrGLBinding == binding);
GrGLint max;
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
fMaxFragmentUniformVectors = max / 4;
}
if (kDesktop_GrGLBinding == binding) {
fRGBA8RenderbufferSupport = true;
} else {
fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
ctxInfo.hasExtension("GL_ARM_rgba8");
}
if (kDesktop_GrGLBinding == binding) {
fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
ctxInfo.hasExtension("GL_EXT_bgra");
} else {
bool hasBGRAExt = false;
if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
} else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
fBGRAIsInternalFormat = true;
}
GrAssert(fBGRAFormatSupport ||
kSkia8888_PM_GrPixelConfig != kBGRA_8888_PM_GrPixelConfig);
}
if (kDesktop_GrGLBinding == binding) {
fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_texture_swizzle");
} else {
fTextureSwizzleSupport = false;
}
if (kDesktop_GrGLBinding == binding) {
fUnpackRowLengthSupport = true;
fUnpackFlipYSupport = false;
fPackRowLengthSupport = true;
fPackFlipYSupport = false;
} else {
fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage");
fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
// no extension for pack row length
fPackRowLengthSupport = false;
fPackFlipYSupport =
ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
}
fTextureUsageSupport = (kES2_GrGLBinding == binding) &&
ctxInfo.hasExtension("GL_ANGLE_texture_usage");
// Tex storage is in desktop 4.2 and can be an extension to desktop or ES.
fTexStorageSupport = (kDesktop_GrGLBinding == binding &&
version >= GR_GL_VER(4,2)) ||
ctxInfo.hasExtension("GL_ARB_texture_storage") ||
ctxInfo.hasExtension("GL_EXT_texture_storage");
// ARB_texture_rg is part of OpenGL 3.0
if (kDesktop_GrGLBinding == binding) {
fTextureRedSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_texture_rg");
} else {
fTextureRedSupport = ctxInfo.hasExtension("GL_ARB_texture_rg");
}
this->initFSAASupport(ctxInfo);
this->initStencilFormats(ctxInfo);
}
bool GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
this->reset();
if (!ctxInfo.isInitialized()) {
return false;
}
GrGLStandard standard = ctxInfo.standard();
GrGLVersion version = ctxInfo.version();
/**************************************************************************
* Caps specific to GrGLCaps
**************************************************************************/
if (kGLES_GrGLStandard == standard) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
&fMaxFragmentUniformVectors);
} else {
SkASSERT(kGL_GrGLStandard == standard);
GrGLint max;
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
fMaxFragmentUniformVectors = max / 4;
if (version >= GR_GL_VER(3, 2)) {
GrGLint profileMask;
GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
}
if (!fIsCoreProfile) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_COORDS, &fMaxFixedFunctionTextureCoords);
// Sanity check
SkASSERT(fMaxFixedFunctionTextureCoords > 0 && fMaxFixedFunctionTextureCoords < 128);
}
}
GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &fMaxFragmentTextureUnits);
if (kGL_GrGLStandard == standard) {
fRGBA8RenderbufferSupport = true;
} else {
fRGBA8RenderbufferSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
ctxInfo.hasExtension("GL_ARM_rgba8");
}
if (kGL_GrGLStandard == standard) {
fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_texture_swizzle");
} else {
fTextureSwizzleSupport = version >= GR_GL_VER(3,0);
}
if (kGL_GrGLStandard == standard) {
fUnpackRowLengthSupport = true;
fUnpackFlipYSupport = false;
fPackRowLengthSupport = true;
fPackFlipYSupport = false;
} else {
fUnpackRowLengthSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_EXT_unpack_subimage");
fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
fPackRowLengthSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_NV_pack_subimage");
fPackFlipYSupport =
ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
}
fTextureUsageSupport = (kGLES_GrGLStandard == standard) &&
ctxInfo.hasExtension("GL_ANGLE_texture_usage");
if (kGL_GrGLStandard == standard) {
// The EXT version can apply to either GL or GLES.
fTexStorageSupport = version >= GR_GL_VER(4,2) ||
ctxInfo.hasExtension("GL_ARB_texture_storage") ||
ctxInfo.hasExtension("GL_EXT_texture_storage");
} else {
// Qualcomm Adreno drivers appear to have issues with texture storage.
fTexStorageSupport = (version >= GR_GL_VER(3,0) &&
kQualcomm_GrGLVendor != ctxInfo.vendor()) ||
ctxInfo.hasExtension("GL_EXT_texture_storage");
}
// ARB_texture_rg is part of OpenGL 3.0, but mesa doesn't support it if
// it doesn't have ARB_texture_rg extension.
if (kGL_GrGLStandard == standard) {
if (ctxInfo.isMesa()) {
fTextureRedSupport = ctxInfo.hasExtension("GL_ARB_texture_rg");
} else {
fTextureRedSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_texture_rg");
}
} else {
fTextureRedSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_EXT_texture_rg");
}
fImagingSupport = kGL_GrGLStandard == standard &&
ctxInfo.hasExtension("GL_ARB_imaging");
// ES 2 only guarantees RGBA/uchar + one other format/type combo for
// ReadPixels. The other format has to checked at run-time since it
// can change based on which render target is bound
fTwoFormatLimit = kGLES_GrGLStandard == standard;
// Known issue on at least some Intel platforms:
// http://code.google.com/p/skia/issues/detail?id=946
if (kIntel_GrGLVendor != ctxInfo.vendor()) {
fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
}
// SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with
// frequently changing VBOs. We've measured a performance increase using non-VBO vertex
// data for dynamic content on these GPUs. Perhaps we should read the renderer string and
// limit this decision to specific GPU families rather than basing it on the vendor alone.
if (!GR_GL_MUST_USE_VBO &&
(kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor())) {
fUseNonVBOVertexAndIndexDynamicData = true;
}
if ((kGL_GrGLStandard == standard && version >= GR_GL_VER(4,3)) ||
(kGLES_GrGLStandard == standard && version >= GR_GL_VER(3,0)) ||
ctxInfo.hasExtension("GL_ARB_invalidate_subdata")) {
fDiscardRenderTargetSupport = true;
fInvalidateFBType = kInvalidate_InvalidateFBType;
} else if (ctxInfo.hasExtension("GL_EXT_discard_framebuffer")) {
fDiscardRenderTargetSupport = true;
fInvalidateFBType = kDiscard_InvalidateFBType;
}
if (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor()) {
fFullClearIsFree = true;
}
if (kGL_GrGLStandard == standard) {
fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_ARB_vertex_array_object");
} else {
fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_OES_vertex_array_object");
}
if (kGLES_GrGLStandard == standard) {
if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
fFBFetchType = kEXT_FBFetchType;
} else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
fFBFetchType = kNV_FBFetchType;
}
}
// Adreno GPUs have a tendency to drop tiles when there is a divide-by-zero in a shader
fDropsTileOnZeroDivide = kQualcomm_GrGLVendor == ctxInfo.vendor();
this->initFSAASupport(ctxInfo, gli);
this->initStencilFormats(ctxInfo);
/**************************************************************************
* GrDrawTargetCaps fields
**************************************************************************/
if (kGL_GrGLStandard == standard) {
// we could also look for GL_ATI_separate_stencil extension or
// GL_EXT_stencil_two_side but they use different function signatures
// than GL2.0+ (and than each other).
fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
// supported on GL 1.4 and higher or by extension
fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
ctxInfo.hasExtension("GL_EXT_stencil_wrap");
} else {
// ES 2 has two sided stencil and stencil wrap
fTwoSidedStencilSupport = true;
fStencilWrapOpsSupport = true;
}
if (kGL_GrGLStandard == standard) {
fMapBufferFlags = kCanMap_MapFlag; // we require VBO support and the desktop VBO
// extension includes glMapBuffer.
if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_map_buffer_range")) {
fMapBufferFlags |= kSubset_MapFlag;
fMapBufferType = kMapBufferRange_MapBufferType;
} else {
fMapBufferType = kMapBuffer_MapBufferType;
}
} else {
// Unextended GLES2 doesn't have any buffer mapping.
fMapBufferFlags = kNone_MapBufferType;
if (ctxInfo.hasExtension("GL_CHROMIUM_map_sub")) {
fMapBufferFlags = kCanMap_MapFlag | kSubset_MapFlag;
fMapBufferType = kChromium_MapBufferType;
} else if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_EXT_map_buffer_range")) {
fMapBufferFlags = kCanMap_MapFlag | kSubset_MapFlag;
fMapBufferType = kMapBufferRange_MapBufferType;
} else if (ctxInfo.hasExtension("GL_OES_mapbuffer")) {
fMapBufferFlags = kCanMap_MapFlag;
fMapBufferType = kMapBuffer_MapBufferType;
}
}
if (kGL_GrGLStandard == standard) {
SkASSERT(ctxInfo.version() >= GR_GL_VER(2,0) ||
ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two"));
fNPOTTextureTileSupport = true;
fMipMapSupport = true;
} else {
// Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
// ES3 has no limitations.
fNPOTTextureTileSupport = ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_OES_texture_npot");
// ES2 supports MIP mapping for POT textures but our caps don't allow for limited MIP
// support. The OES extension or ES 3.0 allow for MIPS on NPOT textures. So, apparently,
// does the undocumented GL_IMG_texture_npot extension. This extension does not seem to
// to alllow arbitrary wrap modes, however.
fMipMapSupport = fNPOTTextureTileSupport || ctxInfo.hasExtension("GL_IMG_texture_npot");
}
fHWAALineSupport = (kGL_GrGLStandard == standard);
GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
// Our render targets are always created with textures as the color
// attachment, hence this min:
fMaxRenderTargetSize = SkTMin(fMaxTextureSize, fMaxRenderTargetSize);
fPathRenderingSupport = ctxInfo.hasExtension("GL_NV_path_rendering") &&
ctxInfo.hasExtension("GL_EXT_direct_state_access");
fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker");
fDstReadInShaderSupport = kNone_FBFetchType != fFBFetchType;
// Disable scratch texture reuse on Mali and Adreno devices
fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor() &&
kQualcomm_GrGLVendor != ctxInfo.vendor();
// Enable supported shader-related caps
if (kGL_GrGLStandard == standard) {
fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_blend_func_extended");
fShaderDerivativeSupport = true;
// we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
} else {
fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
}
if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
} else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
}
this->initConfigTexturableTable(ctxInfo, gli);
this->initConfigRenderableTable(ctxInfo);
return true;
}
void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
this->reset();
if (!ctxInfo.isInitialized()) {
return;
}
GrGLBinding binding = ctxInfo.binding();
GrGLVersion version = ctxInfo.version();
/**************************************************************************
* Caps specific to GrGLCaps
**************************************************************************/
if (kES2_GrGLBinding == binding) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
&fMaxFragmentUniformVectors);
} else {
GrAssert(kDesktop_GrGLBinding == binding);
GrGLint max;
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
fMaxFragmentUniformVectors = max / 4;
}
GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
if (kDesktop_GrGLBinding == binding) {
fRGBA8RenderbufferSupport = true;
} else {
fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
ctxInfo.hasExtension("GL_ARM_rgba8");
}
if (kDesktop_GrGLBinding == binding) {
fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
ctxInfo.hasExtension("GL_EXT_bgra");
} else {
if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
} else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
fBGRAIsInternalFormat = true;
}
GrAssert(fBGRAFormatSupport ||
kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
}
if (kDesktop_GrGLBinding == binding) {
fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_texture_swizzle");
} else {
fTextureSwizzleSupport = false;
}
if (kDesktop_GrGLBinding == binding) {
fUnpackRowLengthSupport = true;
fUnpackFlipYSupport = false;
fPackRowLengthSupport = true;
fPackFlipYSupport = false;
} else {
fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage");
fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
// no extension for pack row length
fPackRowLengthSupport = false;
fPackFlipYSupport =
ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
}
fTextureUsageSupport = (kES2_GrGLBinding == binding) &&
ctxInfo.hasExtension("GL_ANGLE_texture_usage");
// Tex storage is in desktop 4.2 and can be an extension to desktop or ES.
fTexStorageSupport = (kDesktop_GrGLBinding == binding &&
version >= GR_GL_VER(4,2)) ||
ctxInfo.hasExtension("GL_ARB_texture_storage") ||
ctxInfo.hasExtension("GL_EXT_texture_storage");
// ARB_texture_rg is part of OpenGL 3.0
if (kDesktop_GrGLBinding == binding) {
fTextureRedSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_texture_rg");
} else {
fTextureRedSupport = ctxInfo.hasExtension("GL_EXT_texture_rg");
}
fImagingSupport = kDesktop_GrGLBinding == binding &&
ctxInfo.hasExtension("GL_ARB_imaging");
// ES 2 only guarantees RGBA/uchar + one other format/type combo for
// ReadPixels. The other format has to checked at run-time since it
// can change based on which render target is bound
fTwoFormatLimit = kES2_GrGLBinding == binding;
// Known issue on at least some Intel platforms:
// http://code.google.com/p/skia/issues/detail?id=946
if (kIntel_GrGLVendor != ctxInfo.vendor()) {
fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
}
// SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with
// frequently changing VBOs. We've measured a performance increase using non-VBO vertex
// data for dynamic content on these GPUs. Perhaps we should read the renderer string and
// limit this decision to specific GPU families rather than basing it on the vendor alone.
if (!GR_GL_MUST_USE_VBO &&
(kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor())) {
fUseNonVBOVertexAndIndexDynamicData = true;
}
if (kDesktop_GrGLBinding == binding && version >= GR_GL_VER(3, 2)) {
GrGLint profileMask;
GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
}
fDiscardFBSupport = ctxInfo.hasExtension("GL_EXT_discard_framebuffer");
if (kDesktop_GrGLBinding == binding) {
fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_ARB_vertex_array_object");
} else {
fVertexArrayObjectSupport = ctxInfo.hasExtension("GL_OES_vertex_array_object");
}
this->initFSAASupport(ctxInfo, gli);
this->initStencilFormats(ctxInfo);
/**************************************************************************
* GrDrawTargetCaps fields
**************************************************************************/
GrGLint maxTextureUnits;
// check FS and fixed-function texture unit limits
// we only use textures in the fragment stage currently.
// checks are > to make sure we have a spare unit.
GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
GrGLint numFormats;
GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
SkAutoSTMalloc<10, GrGLint> formats(numFormats);
GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
for (int i = 0; i < numFormats; ++i) {
if (formats[i] == GR_GL_PALETTE8_RGBA8) {
f8BitPaletteSupport = true;
break;
}
}
if (kDesktop_GrGLBinding == binding) {
// we could also look for GL_ATI_separate_stencil extension or
// GL_EXT_stencil_two_side but they use different function signatures
// than GL2.0+ (and than each other).
fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
// supported on GL 1.4 and higher or by extension
fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
ctxInfo.hasExtension("GL_EXT_stencil_wrap");
} else {
// ES 2 has two sided stencil and stencil wrap
fTwoSidedStencilSupport = true;
fStencilWrapOpsSupport = true;
}
if (kDesktop_GrGLBinding == binding) {
fBufferLockSupport = true; // we require VBO support and the desktop VBO extension includes
// glMapBuffer.
} else {
fBufferLockSupport = ctxInfo.hasExtension("GL_OES_mapbuffer");
}
if (kDesktop_GrGLBinding == binding) {
if (ctxInfo.version() >= GR_GL_VER(2,0) ||
ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two")) {
fNPOTTextureTileSupport = true;
} else {
fNPOTTextureTileSupport = false;
}
} else {
// Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
fNPOTTextureTileSupport = ctxInfo.hasExtension("GL_OES_texture_npot");
}
fHWAALineSupport = (kDesktop_GrGLBinding == binding);
GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
// Our render targets are always created with textures as the color
// attachment, hence this min:
fMaxRenderTargetSize = GrMin(fMaxTextureSize, fMaxRenderTargetSize);
fPathStencilingSupport = GR_GL_USE_NV_PATH_RENDERING &&
ctxInfo.hasExtension("GL_NV_path_rendering");
// Enable supported shader-related caps
if (kDesktop_GrGLBinding == binding) {
fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_blend_func_extended");
fShaderDerivativeSupport = true;
// we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
} else {
fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
}
if (GrGLCaps::kImaginationES_MSFBOType == fMSFBOType) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
} else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
}
}
void GrGLCaps::initConfigTexturableTable(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
GrGLStandard standard = ctxInfo.standard();
GrGLVersion version = ctxInfo.version();
// Base texture support
fConfigTextureSupport[kAlpha_8_GrPixelConfig] = true;
fConfigTextureSupport[kRGB_565_GrPixelConfig] = true;
fConfigTextureSupport[kRGBA_4444_GrPixelConfig] = true;
fConfigTextureSupport[kRGBA_8888_GrPixelConfig] = true;
// Check for 8-bit palette..
GrGLint numFormats;
GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
if (numFormats) {
SkAutoSTMalloc<10, GrGLint> formats(numFormats);
GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
for (int i = 0; i < numFormats; ++i) {
if (GR_GL_PALETTE8_RGBA8 == formats[i]) {
fConfigTextureSupport[kIndex_8_GrPixelConfig] = true;
break;
}
}
}
// Check for BGRA
if (kGL_GrGLStandard == standard) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] =
version >= GR_GL_VER(1,2) || ctxInfo.hasExtension("GL_EXT_bgra");
} else {
if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] = true;
} else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] = true;
fBGRAIsInternalFormat = true;
}
SkASSERT(fConfigTextureSupport[kBGRA_8888_GrPixelConfig] ||
kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
}
// Compressed texture support
// glCompressedTexImage2D is available on all OpenGL ES devices...
// however, it is only available on standard OpenGL after version 1.3
bool hasCompressTex2D = (kGL_GrGLStandard != standard || version >= GR_GL_VER(1, 3));
// Check for ETC1
bool hasETC1 = false;
// First check version for support
if (kGL_GrGLStandard == standard) {
hasETC1 = hasCompressTex2D &&
(version >= GR_GL_VER(4, 3) ||
ctxInfo.hasExtension("GL_ARB_ES3_compatibility"));
} else {
hasETC1 = hasCompressTex2D &&
(version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_OES_compressed_ETC1_RGB8_texture") ||
// ETC2 is a superset of ETC1, so we can just check for that, too.
(ctxInfo.hasExtension("GL_OES_compressed_ETC2_RGB8_texture") &&
ctxInfo.hasExtension("GL_OES_compressed_ETC2_RGBA8_texture")));
}
fConfigTextureSupport[kETC1_GrPixelConfig] = hasETC1;
// Check for LATC under its various forms
LATCAlias alias = kLATC_LATCAlias;
bool hasLATC = hasCompressTex2D &&
(ctxInfo.hasExtension("GL_EXT_texture_compression_latc") ||
ctxInfo.hasExtension("GL_NV_texture_compression_latc"));
// Check for RGTC
if (!hasLATC) {
// If we're using OpenGL 3.0 or later, then we have RGTC, an identical compression format.
if (kGL_GrGLStandard == standard) {
hasLATC = version >= GR_GL_VER(3, 0);
}
if (!hasLATC) {
hasLATC =
ctxInfo.hasExtension("GL_EXT_texture_compression_rgtc") ||
ctxInfo.hasExtension("GL_ARB_texture_compression_rgtc");
}
if (hasLATC) {
alias = kRGTC_LATCAlias;
}
}
// Check for 3DC
if (!hasLATC) {
hasLATC = ctxInfo.hasExtension("GL_AMD_compressed_3DC_texture");
if (hasLATC) {
alias = k3DC_LATCAlias;
}
}
fConfigTextureSupport[kLATC_GrPixelConfig] = hasLATC;
fLATCAlias = alias;
}
void GrGLCaps::initConfigTexturableTable(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
GrGLStandard standard = ctxInfo.standard();
GrGLVersion version = ctxInfo.version();
// Base texture support
fConfigTextureSupport[kAlpha_8_GrPixelConfig] = true;
fConfigTextureSupport[kRGB_565_GrPixelConfig] = true;
fConfigTextureSupport[kRGBA_4444_GrPixelConfig] = true;
fConfigTextureSupport[kRGBA_8888_GrPixelConfig] = true;
// Check for 8-bit palette..
GrGLint numFormats;
GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
if (numFormats) {
SkAutoSTMalloc<10, GrGLint> formats(numFormats);
GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
for (int i = 0; i < numFormats; ++i) {
if (GR_GL_PALETTE8_RGBA8 == formats[i]) {
fConfigTextureSupport[kIndex_8_GrPixelConfig] = true;
break;
}
}
}
// Check for BGRA
if (kGL_GrGLStandard == standard) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] =
version >= GR_GL_VER(1,2) || ctxInfo.hasExtension("GL_EXT_bgra");
} else {
if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] = true;
} else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
fConfigTextureSupport[kBGRA_8888_GrPixelConfig] = true;
fBGRAIsInternalFormat = true;
}
SkASSERT(fConfigTextureSupport[kBGRA_8888_GrPixelConfig] ||
kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
}
// Check for sRGBA
if (kGL_GrGLStandard == standard) {
fConfigTextureSupport[kSRGBA_8888_GrPixelConfig] =
(version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_EXT_texture_sRGB"));
} else {
fConfigTextureSupport[kSRGBA_8888_GrPixelConfig] =
(version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_EXT_sRGB"));
}
// Compressed texture support
// glCompressedTexImage2D is available on all OpenGL ES devices...
// however, it is only available on standard OpenGL after version 1.3
bool hasCompressTex2D = (kGL_GrGLStandard != standard || version >= GR_GL_VER(1, 3));
fCompressedTexSubImageSupport =
hasCompressTex2D && (gli->fFunctions.fCompressedTexSubImage2D);
// Check for ETC1
bool hasETC1 = false;
// First check version for support
if (kGL_GrGLStandard == standard) {
hasETC1 = hasCompressTex2D &&
(version >= GR_GL_VER(4, 3) ||
ctxInfo.hasExtension("GL_ARB_ES3_compatibility"));
} else {
hasETC1 = hasCompressTex2D &&
(version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_OES_compressed_ETC1_RGB8_texture") ||
// ETC2 is a superset of ETC1, so we can just check for that, too.
(ctxInfo.hasExtension("GL_OES_compressed_ETC2_RGB8_texture") &&
ctxInfo.hasExtension("GL_OES_compressed_ETC2_RGBA8_texture")));
}
fConfigTextureSupport[kETC1_GrPixelConfig] = hasETC1;
// Check for LATC under its various forms
LATCAlias alias = kLATC_LATCAlias;
bool hasLATC = hasCompressTex2D &&
(ctxInfo.hasExtension("GL_EXT_texture_compression_latc") ||
ctxInfo.hasExtension("GL_NV_texture_compression_latc"));
// Check for RGTC
if (!hasLATC) {
// If we're using OpenGL 3.0 or later, then we have RGTC, an identical compression format.
if (kGL_GrGLStandard == standard) {
hasLATC = version >= GR_GL_VER(3, 0);
}
if (!hasLATC) {
hasLATC =
ctxInfo.hasExtension("GL_EXT_texture_compression_rgtc") ||
ctxInfo.hasExtension("GL_ARB_texture_compression_rgtc");
}
if (hasLATC) {
alias = kRGTC_LATCAlias;
}
}
// Check for 3DC
if (!hasLATC) {
hasLATC = ctxInfo.hasExtension("GL_AMD_compressed_3DC_texture");
if (hasLATC) {
alias = k3DC_LATCAlias;
}
}
fConfigTextureSupport[kLATC_GrPixelConfig] = hasLATC;
fLATCAlias = alias;
// Check for R11_EAC ... We don't support R11_EAC on desktop, as most
// cards default to decompressing the textures in the driver, and is
// generally slower.
if (kGL_GrGLStandard != standard) {
fConfigTextureSupport[kR11_EAC_GrPixelConfig] = version >= GR_GL_VER(3, 0);
}
// Check for ASTC
fConfigTextureSupport[kASTC_12x12_GrPixelConfig] =
ctxInfo.hasExtension("GL_KHR_texture_compression_astc_hdr") ||
ctxInfo.hasExtension("GL_KHR_texture_compression_astc_ldr") ||
ctxInfo.hasExtension("GL_OES_texture_compression_astc");
// Check for floating point texture support
// NOTE: We disallow floating point textures on ES devices if linear
// filtering modes are not supported. This is for simplicity, but a more
// granular approach is possible. Coincidentally, floating point textures became part of
// the standard in ES3.1 / OGL 3.1, hence the shorthand
bool hasFPTextures = version >= GR_GL_VER(3, 1);
if (!hasFPTextures) {
hasFPTextures = ctxInfo.hasExtension("GL_ARB_texture_float") ||
(ctxInfo.hasExtension("GL_OES_texture_float_linear") &&
ctxInfo.hasExtension("GL_OES_texture_float"));
}
fConfigTextureSupport[kRGBA_float_GrPixelConfig] = hasFPTextures;
// Check for fp16 texture support
// NOTE: We disallow floating point textures on ES devices if linear
// filtering modes are not supported. This is for simplicity, but a more
// granular approach is possible. Coincidentally, 16-bit floating point textures became part of
// the standard in ES3.1 / OGL 3.1, hence the shorthand
bool hasHalfFPTextures = version >= GR_GL_VER(3, 1);
if (!hasHalfFPTextures) {
hasHalfFPTextures = ctxInfo.hasExtension("GL_ARB_texture_float") ||
(ctxInfo.hasExtension("GL_OES_texture_half_float_linear") &&
ctxInfo.hasExtension("GL_OES_texture_half_float"));
}
fConfigTextureSupport[kAlpha_half_GrPixelConfig] = hasHalfFPTextures;
}
int SDL_main(int argc, char** argv) {
#else
int main(int argc, char** argv) {
#endif
uint32_t windowFlags = 0;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_GLContext glContext = nullptr;
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_IOS)
// For Android/iOS we need to set up for OpenGL ES and we make the window hi res & full screen
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE |
SDL_WINDOW_BORDERLESS | SDL_WINDOW_FULLSCREEN_DESKTOP |
SDL_WINDOW_ALLOW_HIGHDPI;
#else
// For all other clients we use the core profile and operate in a window
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
#endif
static const int kStencilBits = 8; // Skia needs 8 stencil bits
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, kStencilBits);
SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
// If you want multisampling, uncomment the below lines and set a sample count
static const int kMsaaSampleCount = 0; //4;
// SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
// SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, kMsaaSampleCount);
/*
* In a real application you might want to initialize more subsystems
*/
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS) != 0) {
handle_error();
return 1;
}
// Setup window
// This code will create a window with the same resolution as the user's desktop.
SDL_DisplayMode dm;
if (SDL_GetDesktopDisplayMode(0, &dm) != 0) {
handle_error();
return 1;
}
SDL_Window* window = SDL_CreateWindow("SDL Window", SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, dm.w, dm.h, windowFlags);
if (!window) {
handle_error();
return 1;
}
// To go fullscreen
// SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN);
// try and setup a GL context
glContext = SDL_GL_CreateContext(window);
if (!glContext) {
handle_error();
return 1;
}
int success = SDL_GL_MakeCurrent(window, glContext);
if (success != 0) {
handle_error();
return success;
}
uint32_t windowFormat = SDL_GetWindowPixelFormat(window);
int contextType;
SDL_GL_GetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, &contextType);
int dw, dh;
SDL_GL_GetDrawableSize(window, &dw, &dh);
glViewport(0, 0, dw, dh);
glClearColor(1, 1, 1, 1);
glClearStencil(0);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
// setup GrContext
auto interface = GrGLMakeNativeInterface();
// setup contexts
sk_sp<GrContext> grContext(GrContext::MakeGL(interface));
SkASSERT(grContext);
// Wrap the frame buffer object attached to the screen in a Skia render target so Skia can
// render to it
GrGLint buffer;
GR_GL_GetIntegerv(interface.get(), GR_GL_FRAMEBUFFER_BINDING, &buffer);
GrGLFramebufferInfo info;
info.fFBOID = (GrGLuint) buffer;
SkColorType colorType;
//SkDebugf("%s", SDL_GetPixelFormatName(windowFormat));
// TODO: the windowFormat is never any of these?
if (SDL_PIXELFORMAT_RGBA8888 == windowFormat) {
info.fFormat = GR_GL_RGBA8;
colorType = kRGBA_8888_SkColorType;
} else {
colorType = kBGRA_8888_SkColorType;
if (SDL_GL_CONTEXT_PROFILE_ES == contextType) {
info.fFormat = GR_GL_BGRA8;
} else {
// We assume the internal format is RGBA8 on desktop GL
info.fFormat = GR_GL_RGBA8;
}
}
GrBackendRenderTarget target(dw, dh, kMsaaSampleCount, kStencilBits, info);
// setup SkSurface
// To use distance field text, use commented out SkSurfaceProps instead
// SkSurfaceProps props(SkSurfaceProps::kUseDeviceIndependentFonts_Flag,
// SkSurfaceProps::kLegacyFontHost_InitType);
SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
sk_sp<SkSurface> surface(SkSurface::MakeFromBackendRenderTarget(grContext.get(), target,
kBottomLeft_GrSurfaceOrigin,
colorType, nullptr, &props));
SkCanvas* canvas = surface->getCanvas();
canvas->scale((float)dw/dm.w, (float)dh/dm.h);
ApplicationState state;
const char* helpMessage = "Click and drag to create rects. Press esc to quit.";
SkPaint paint;
// create a surface for CPU rasterization
sk_sp<SkSurface> cpuSurface(SkSurface::MakeRaster(canvas->imageInfo()));
SkCanvas* offscreen = cpuSurface->getCanvas();
offscreen->save();
offscreen->translate(50.0f, 50.0f);
offscreen->drawPath(create_star(), paint);
offscreen->restore();
sk_sp<SkImage> image = cpuSurface->makeImageSnapshot();
int rotation = 0;
SkFont font;
while (!state.fQuit) { // Our application loop
SkRandom rand;
canvas->clear(SK_ColorWHITE);
handle_events(&state, canvas);
paint.setColor(SK_ColorBLACK);
canvas->drawString(helpMessage, 100.0f, 100.0f, font, paint);
for (int i = 0; i < state.fRects.count(); i++) {
paint.setColor(rand.nextU() | 0x44808080);
canvas->drawRect(state.fRects[i], paint);
}
// draw offscreen canvas
canvas->save();
canvas->translate(dm.w / 2.0, dm.h / 2.0);
canvas->rotate(rotation++);
canvas->drawImage(image, -50.0f, -50.0f);
canvas->restore();
canvas->flush();
SDL_GL_SwapWindow(window);
}
if (glContext) {
SDL_GL_DeleteContext(glContext);
}
//Destroy window
SDL_DestroyWindow(window);
//Quit SDL subsystems
SDL_Quit();
return 0;
}
void GrGLCaps::init(const GrGLContextInfo& ctxInfo) {
this->reset();
if (!ctxInfo.isInitialized()) {
return;
}
const GrGLInterface* gli = ctxInfo.interface();
GrGLBinding binding = ctxInfo.binding();
GrGLVersion version = ctxInfo.version();
if (kES2_GrGLBinding == binding) {
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
&fMaxFragmentUniformVectors);
} else {
GrAssert(kDesktop_GrGLBinding == binding);
GrGLint max;
GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
fMaxFragmentUniformVectors = max / 4;
}
GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
if (kDesktop_GrGLBinding == binding) {
fRGBA8RenderbufferSupport = true;
} else {
fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
ctxInfo.hasExtension("GL_ARM_rgba8");
}
if (kDesktop_GrGLBinding == binding) {
fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
ctxInfo.hasExtension("GL_EXT_bgra");
} else {
if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
} else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
fBGRAFormatSupport = true;
fBGRAIsInternalFormat = true;
}
GrAssert(fBGRAFormatSupport ||
kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
}
if (kDesktop_GrGLBinding == binding) {
fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
ctxInfo.hasExtension("GL_ARB_texture_swizzle");
} else {
fTextureSwizzleSupport = false;
}
if (kDesktop_GrGLBinding == binding) {
fUnpackRowLengthSupport = true;
fUnpackFlipYSupport = false;
fPackRowLengthSupport = true;
fPackFlipYSupport = false;
} else {
fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage");
fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
// no extension for pack row length
fPackRowLengthSupport = false;
fPackFlipYSupport =
ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
}
fTextureUsageSupport = (kES2_GrGLBinding == binding) &&
ctxInfo.hasExtension("GL_ANGLE_texture_usage");
// Tex storage is in desktop 4.2 and can be an extension to desktop or ES.
fTexStorageSupport = (kDesktop_GrGLBinding == binding &&
version >= GR_GL_VER(4,2)) ||
ctxInfo.hasExtension("GL_ARB_texture_storage") ||
ctxInfo.hasExtension("GL_EXT_texture_storage");
// ARB_texture_rg is part of OpenGL 3.0
if (kDesktop_GrGLBinding == binding) {
fTextureRedSupport = version >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_texture_rg");
} else {
fTextureRedSupport = ctxInfo.hasExtension("GL_EXT_texture_rg");
}
fImagingSupport = kDesktop_GrGLBinding == binding &&
ctxInfo.hasExtension("GL_ARB_imaging");
// ES 2 only guarantees RGBA/uchar + one other format/type combo for
// ReadPixels. The other format has to checked at run-time since it
// can change based on which render target is bound
fTwoFormatLimit = kES2_GrGLBinding == binding;
// Known issue on at least some Intel platforms:
// http://code.google.com/p/skia/issues/detail?id=946
if (kIntel_GrGLVendor != ctxInfo.vendor()) {
fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
}
this->initFSAASupport(ctxInfo);
this->initStencilFormats(ctxInfo);
}
