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);
}
}
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);
}
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);
}
