blob: 7d9c50d16b4965e07c80880e2eda11cfd1988abc [file] [log] [blame]
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGLCaps.h"
#include "GrGLContext.h"
#include "SkTSearch.h"
#include "SkTSort.h"
GrGLCaps::GrGLCaps() {
this->reset();
}
void GrGLCaps::reset() {
INHERITED::reset();
fVerifiedColorConfigs.reset();
fStencilFormats.reset();
fStencilVerifiedColorConfigs.reset();
fMSFBOType = kNone_MSFBOType;
fInvalidateFBType = kNone_InvalidateFBType;
fLATCAlias = kLATC_LATCAlias;
fMapBufferType = kNone_MapBufferType;
fMaxFragmentUniformVectors = 0;
fMaxVertexAttributes = 0;
fMaxFragmentTextureUnits = 0;
fRGBA8RenderbufferSupport = false;
fBGRAIsInternalFormat = false;
fTextureSwizzleSupport = false;
fUnpackRowLengthSupport = false;
fUnpackFlipYSupport = false;
fPackRowLengthSupport = false;
fPackFlipYSupport = false;
fTextureUsageSupport = false;
fTexStorageSupport = false;
fTextureRedSupport = false;
fImagingSupport = false;
fTwoFormatLimit = false;
fFragCoordsConventionSupport = false;
fVertexArrayObjectSupport = false;
fES2CompatibilitySupport = false;
fUseNonVBOVertexAndIndexDynamicData = false;
fIsCoreProfile = false;
fFullClearIsFree = false;
fFBMixedSamplesSupport = false;
fReadPixelsSupportedCache.reset();
fShaderCaps.reset(SkNEW(GrGLSLCaps));
}
GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrCaps() {
*this = caps;
}
GrGLCaps& GrGLCaps::operator= (const GrGLCaps& caps) {
INHERITED::operator=(caps);
fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
fStencilFormats = caps.fStencilFormats;
fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
fLATCAlias = caps.fLATCAlias;
fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
fMaxVertexAttributes = caps.fMaxVertexAttributes;
fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
fMSFBOType = caps.fMSFBOType;
fInvalidateFBType = caps.fInvalidateFBType;
fMapBufferType = caps.fMapBufferType;
fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat;
fTextureSwizzleSupport = caps.fTextureSwizzleSupport;
fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport;
fUnpackFlipYSupport = caps.fUnpackFlipYSupport;
fPackRowLengthSupport = caps.fPackRowLengthSupport;
fPackFlipYSupport = caps.fPackFlipYSupport;
fTextureUsageSupport = caps.fTextureUsageSupport;
fTexStorageSupport = caps.fTexStorageSupport;
fTextureRedSupport = caps.fTextureRedSupport;
fImagingSupport = caps.fImagingSupport;
fTwoFormatLimit = caps.fTwoFormatLimit;
fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport;
fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
fES2CompatibilitySupport = caps.fES2CompatibilitySupport;
fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
fIsCoreProfile = caps.fIsCoreProfile;
fFullClearIsFree = caps.fFullClearIsFree;
fFBMixedSamplesSupport = caps.fFBMixedSamplesSupport;
*(reinterpret_cast<GrGLSLCaps*>(fShaderCaps.get())) =
*(reinterpret_cast<GrGLSLCaps*>(caps.fShaderCaps.get()));
return *this;
}
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);
}
}
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");
}
if (kGL_GrGLStandard == standard) {
fTextureBarrierSupport = version >= GR_GL_VER(4,5) ||
ctxInfo.hasExtension("GL_ARB_texture_barrier") ||
ctxInfo.hasExtension("GL_NV_texture_barrier");
} else {
fTextureBarrierSupport = ctxInfo.hasExtension("GL_NV_texture_barrier");
}
// ARB_texture_rg is part of OpenGL 3.0, but mesa doesn't support GL_RED
// and GL_RG on FBO textures.
if (!ctxInfo.isMesa()) {
if (kGL_GrGLStandard == standard) {
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;
// Frag Coords Convention support is not part of ES
// Known issue on at least some Intel platforms:
// http://code.google.com/p/skia/issues/detail?id=946
if (kIntel_GrGLVendor != ctxInfo.vendor() && kGLES_GrGLStandard != standard) {
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() ||
kQualcomm_GrGLVendor == ctxInfo.vendor())) {
fUseNonVBOVertexAndIndexDynamicData = true;
}
// A driver but on the nexus 6 causes incorrect dst copies when invalidate is called beforehand.
// Thus we are blacklisting this extension for now on Adreno4xx devices.
if (kAdreno4xx_GrGLRenderer != ctxInfo.renderer() &&
((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") ||
ctxInfo.hasExtension("GL_APPLE_vertex_array_object");
} else {
fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_OES_vertex_array_object");
}
if (kGL_GrGLStandard == standard) {
fES2CompatibilitySupport = ctxInfo.hasExtension("GL_ARB_ES2_compatibility");
}
else {
fES2CompatibilitySupport = true;
}
this->initFSAASupport(ctxInfo, gli);
this->initStencilFormats(ctxInfo);
/**************************************************************************
* GrCaps 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;
}
// Disabling advanced blend until we can resolve various bugs
#if 0
if (kIntel_GrGLVendor != ctxInfo.vendor()) {
if (ctxInfo.hasExtension("GL_KHR_blend_equation_advanced_coherent") ||
ctxInfo.hasExtension("GL_NV_blend_equation_advanced_coherent")) {
fBlendEquationSupport = kAdvancedCoherent_BlendEquationSupport;
} else if (ctxInfo.hasExtension("GL_KHR_blend_equation_advanced") ||
ctxInfo.hasExtension("GL_NV_blend_equation_advanced")) {
fBlendEquationSupport = kAdvanced_BlendEquationSupport;
} else {
fBlendEquationSupport = kBasic_BlendEquationSupport;
}
} else {
// On Intel platforms, KHR_blend_equation_advanced is not conformant.
fBlendEquationSupport = kBasic_BlendEquationSupport;
}
#endif
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");
}
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);
fFBMixedSamplesSupport = ctxInfo.hasExtension("GL_NV_framebuffer_mixed_samples");
fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker");
// Disable scratch texture reuse on Mali and Adreno devices
fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor() &&
kQualcomm_GrGLVendor != ctxInfo.vendor();
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);
}
if (kPowerVR54x_GrGLRenderer == ctxInfo.renderer() ||
kPowerVRRogue_GrGLRenderer == ctxInfo.renderer() ||
kAdreno3xx_GrGLRenderer == ctxInfo.renderer()) {
fUseDrawInsteadOfClear = true;
}
if (kGL_GrGLStandard == standard) {
// ARB allows mixed size FBO attachments, EXT does not.
if (ctxInfo.version() >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
fOversizedStencilSupport = true;
} else {
SkASSERT(ctxInfo.hasExtension("GL_EXT_framebuffer_object"));
}
} else {
// ES 3.0 supports mixed size FBO attachments, 2.0 does not.
fOversizedStencilSupport = ctxInfo.version() >= GR_GL_VER(3, 0);
}
this->initConfigTexturableTable(ctxInfo, gli);
this->initConfigRenderableTable(ctxInfo);
reinterpret_cast<GrGLSLCaps*>(fShaderCaps.get())->init(ctxInfo, gli, *this);
return true;
}
void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
// OpenGL < 3.0
// no support for render targets unless the GL_ARB_framebuffer_object
// extension is supported (in which case we get ALPHA, RED, RG, RGB,
// RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
// probably don't get R8 in this case.
// OpenGL 3.0
// base color renderable: ALPHA, RED, RG, RGB, and RGBA
// sized derivatives: ALPHA8, R8, RGBA4, RGBA8
// >= OpenGL 3.1
// base color renderable: RED, RG, RGB, and RGBA
// sized derivatives: R8, RGBA4, RGBA8
// if the GL_ARB_compatibility extension is supported then we get back
// support for GL_ALPHA and ALPHA8
// GL_EXT_bgra adds BGRA render targets to any version
// ES 2.0
// color renderable: RGBA4, RGB5_A1, RGB565
// GL_EXT_texture_rg adds support for R8 as a color render target
// GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
// GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888 added BGRA support
// ES 3.0
// Same as ES 2.0 except R8 and RGBA8 are supported without extensions (the functions called
// below already account for this).
GrGLStandard standard = ctxInfo.standard();
enum {
kNo_MSAA = 0,
kYes_MSAA = 1,
};
if (kGL_GrGLStandard == standard) {
// Post 3.0 we will get R8
// Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
if (ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = true;
}
} else {
// On ES we can only hope for R8
fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = fTextureRedSupport;
fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = fTextureRedSupport;
}
if (kGL_GrGLStandard != standard) {
// only available in ES
fConfigRenderSupport[kRGB_565_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kRGB_565_GrPixelConfig][kYes_MSAA] = true;
}
// we no longer support 444 as a render target
fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kNo_MSAA] = false;
fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kYes_MSAA] = false;
if (this->fRGBA8RenderbufferSupport) {
fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kYes_MSAA] = true;
}
if (this->isConfigTexturable(kBGRA_8888_GrPixelConfig)) {
fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kNo_MSAA] = true;
// The GL_EXT_texture_format_BGRA8888 extension does not add BGRA to the list of
// configs that are color-renderable and can be passed to glRenderBufferStorageMultisample.
// Chromium may have an extension to allow BGRA renderbuffers to work on desktop platforms.
if (ctxInfo.hasExtension("GL_CHROMIUM_renderbuffer_format_BGRA8888")) {
fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] = true;
} else {
fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
!fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
}
}
if (this->fRGBA8RenderbufferSupport && this->isConfigTexturable(kSRGBA_8888_GrPixelConfig)) {
if (kGL_GrGLStandard == standard) {
if (ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_ARB_framebuffer_sRGB") ||
ctxInfo.hasExtension("GL_EXT_framebuffer_sRGB")) {
fConfigRenderSupport[kSRGBA_8888_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kSRGBA_8888_GrPixelConfig][kYes_MSAA] = true;
}
} else {
if (ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_EXT_sRGB")) {
fConfigRenderSupport[kSRGBA_8888_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kSRGBA_8888_GrPixelConfig][kYes_MSAA] = true;
}
}
}
if (this->isConfigTexturable(kRGBA_float_GrPixelConfig)) {
if (kGL_GrGLStandard == standard) {
fConfigRenderSupport[kRGBA_float_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kRGBA_float_GrPixelConfig][kYes_MSAA] = true;
} else {
if (ctxInfo.hasExtension("GL_EXT_color_buffer_float")) {
fConfigRenderSupport[kRGBA_float_GrPixelConfig][kNo_MSAA] = true;
} else {
fConfigRenderSupport[kRGBA_float_GrPixelConfig][kNo_MSAA] = false;
}
// for now we don't support floating point MSAA on ES
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kYes_MSAA] = false;
}
}
if (this->isConfigTexturable(kAlpha_half_GrPixelConfig)) {
if (kGL_GrGLStandard == standard) {
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kNo_MSAA] = true;
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kYes_MSAA] = true;
} else if (ctxInfo.version() >= GR_GL_VER(3,0)) {
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kNo_MSAA] = true;
// for now we don't support floating point MSAA on ES
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kYes_MSAA] = false;
} else {
if (ctxInfo.hasExtension("GL_EXT_color_buffer_half_float") && fTextureRedSupport) {
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kNo_MSAA] = true;
} else {
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kNo_MSAA] = false;
}
// for now we don't support floating point MSAA on ES
fConfigRenderSupport[kAlpha_half_GrPixelConfig][kYes_MSAA] = false;
}
}
// If we don't support MSAA then undo any places above where we set a config as renderable with
// msaa.
if (kNone_MSFBOType == fMSFBOType) {
for (int i = 0; i < kGrPixelConfigCnt; ++i) {
fConfigRenderSupport[i][kYes_MSAA] = false;
}
}
}
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;
}
bool GrGLCaps::doReadPixelsSupported(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;
}
bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
GrGLenum format,
GrGLenum type,
GrGLenum currFboFormat) const {
ReadPixelsSupportedFormat key = {format, type, currFboFormat};
if (const bool* supported = fReadPixelsSupportedCache.find(key)) {
return *supported;
}
bool supported = this->doReadPixelsSupported(intf, format, type);
fReadPixelsSupportedCache.set(key, supported);
return supported;
}
void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
fMSFBOType = kNone_MSFBOType;
if (kGL_GrGLStandard != ctxInfo.standard()) {
// We prefer the EXT/IMG extension over ES3 MSAA because we've observed
// ES3 driver bugs on at least one device with a tiled GPU (N10).
if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
} else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
} else if (ctxInfo.version() >= GR_GL_VER(3,0)) {
fMSFBOType = GrGLCaps::kES_3_0_MSFBOType;
} else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
// chrome's extension is equivalent to the EXT msaa
// and fbo_blit extensions.
fMSFBOType = kDesktop_EXT_MSFBOType;
} else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
fMSFBOType = kES_Apple_MSFBOType;
}
} else {
if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
} else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
}
}
}
namespace {
const GrGLuint kUnknownBitCount = GrGLStencilAttachment::kUnknownBitCount;
}
void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
// Build up list of legal stencil formats (though perhaps not supported on
// the particular gpu/driver) from most preferred to least.
// these consts are in order of most preferred to least preferred
// we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8
static const StencilFormat
// internal Format stencil bits total bits packed?
gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false},
gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false},
gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true },
gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false},
// gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false},
gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true };
if (kGL_GrGLStandard == ctxInfo.standard()) {
bool supportsPackedDS =
ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") ||
ctxInfo.hasExtension("GL_ARB_framebuffer_object");
// S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we
// require FBO support we can expect these are legal formats and don't
// check. These also all support the unsized GL_STENCIL_INDEX.
fStencilFormats.push_back() = gS8;
fStencilFormats.push_back() = gS16;
if (supportsPackedDS) {
fStencilFormats.push_back() = gD24S8;
}
fStencilFormats.push_back() = gS4;
if (supportsPackedDS) {
fStencilFormats.push_back() = gDS;
}
} else {
// ES2 has STENCIL_INDEX8 without extensions but requires extensions
// for other formats.
// ES doesn't support using the unsized format.
fStencilFormats.push_back() = gS8;
//fStencilFormats.push_back() = gS16;
if (ctxInfo.version() >= GR_GL_VER(3,0) ||
ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) {
fStencilFormats.push_back() = gD24S8;
}
if (ctxInfo.hasExtension("GL_OES_stencil4")) {
fStencilFormats.push_back() = gS4;
}
}
SkASSERT(0 == fStencilVerifiedColorConfigs.count());
fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
}
void GrGLCaps::markColorConfigAndStencilFormatAsVerified(
GrPixelConfig config,
const GrGLStencilAttachment::Format& format) {
#if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
return;
#endif
SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
SkASSERT(fStencilFormats.count() == fStencilVerifiedColorConfigs.count());
int count = fStencilFormats.count();
// we expect a really small number of possible formats so linear search
// should be OK
SkASSERT(count < 16);
for (int i = 0; i < count; ++i) {
if (format.fInternalFormat ==
fStencilFormats[i].fInternalFormat) {
fStencilVerifiedColorConfigs[i].markVerified(config);
return;
}
}
SkFAIL("Why are we seeing a stencil format that "
"GrGLCaps doesn't know about.");
}
bool GrGLCaps::isColorConfigAndStencilFormatVerified(
GrPixelConfig config,
const GrGLStencilAttachment::Format& format) const {
#if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
return false;
#endif
SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
int count = fStencilFormats.count();
// we expect a really small number of possible formats so linear search
// should be OK
SkASSERT(count < 16);
for (int i = 0; i < count; ++i) {
if (format.fInternalFormat ==
fStencilFormats[i].fInternalFormat) {
return fStencilVerifiedColorConfigs[i].isVerified(config);
}
}
SkFAIL("Why are we seeing a stencil format that "
"GLCaps doesn't know about.");
return false;
}
SkString GrGLCaps::dump() const {
SkString r = INHERITED::dump();
r.appendf("--- GL-Specific ---\n");
for (int i = 0; i < fStencilFormats.count(); ++i) {
r.appendf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
i,
fStencilFormats[i].fStencilBits,
fStencilFormats[i].fTotalBits);
}
static const char* kMSFBOExtStr[] = {
"None",
"ARB",
"EXT",
"ES 3.0",
"Apple",
"IMG MS To Texture",
"EXT MS To Texture",
};
GR_STATIC_ASSERT(0 == kNone_MSFBOType);
GR_STATIC_ASSERT(1 == kDesktop_ARB_MSFBOType);
GR_STATIC_ASSERT(2 == kDesktop_EXT_MSFBOType);
GR_STATIC_ASSERT(3 == kES_3_0_MSFBOType);
GR_STATIC_ASSERT(4 == kES_Apple_MSFBOType);
GR_STATIC_ASSERT(5 == kES_IMG_MsToTexture_MSFBOType);
GR_STATIC_ASSERT(6 == kES_EXT_MsToTexture_MSFBOType);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1);
static const char* kInvalidateFBTypeStr[] = {
"None",
"Discard",
"Invalidate",
};
GR_STATIC_ASSERT(0 == kNone_InvalidateFBType);
GR_STATIC_ASSERT(1 == kDiscard_InvalidateFBType);
GR_STATIC_ASSERT(2 == kInvalidate_InvalidateFBType);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kInvalidateFBTypeStr) == kLast_InvalidateFBType + 1);
static const char* kMapBufferTypeStr[] = {
"None",
"MapBuffer",
"MapBufferRange",
"Chromium",
};
GR_STATIC_ASSERT(0 == kNone_MapBufferType);
GR_STATIC_ASSERT(1 == kMapBuffer_MapBufferType);
GR_STATIC_ASSERT(2 == kMapBufferRange_MapBufferType);
GR_STATIC_ASSERT(3 == kChromium_MapBufferType);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kMapBufferTypeStr) == kLast_MapBufferType + 1);
r.appendf("Core Profile: %s\n", (fIsCoreProfile ? "YES" : "NO"));
r.appendf("MSAA Type: %s\n", kMSFBOExtStr[fMSFBOType]);
r.appendf("Invalidate FB Type: %s\n", kInvalidateFBTypeStr[fInvalidateFBType]);
r.appendf("Map Buffer Type: %s\n", kMapBufferTypeStr[fMapBufferType]);
r.appendf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
r.appendf("Max FS Texture Units: %d\n", fMaxFragmentTextureUnits);
r.appendf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
r.appendf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
r.appendf("BGRA is an internal format: %s\n", (fBGRAIsInternalFormat ? "YES": "NO"));
r.appendf("Support texture swizzle: %s\n", (fTextureSwizzleSupport ? "YES": "NO"));
r.appendf("Unpack Row length support: %s\n", (fUnpackRowLengthSupport ? "YES": "NO"));
r.appendf("Unpack Flip Y support: %s\n", (fUnpackFlipYSupport ? "YES": "NO"));
r.appendf("Pack Row length support: %s\n", (fPackRowLengthSupport ? "YES": "NO"));
r.appendf("Pack Flip Y support: %s\n", (fPackFlipYSupport ? "YES": "NO"));
r.appendf("Texture Usage support: %s\n", (fTextureUsageSupport ? "YES": "NO"));
r.appendf("Texture Storage support: %s\n", (fTexStorageSupport ? "YES": "NO"));
r.appendf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
r.appendf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
r.appendf("Fragment coord conventions support: %s\n",
(fFragCoordsConventionSupport ? "YES": "NO"));
r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
r.appendf("Use non-VBO for dynamic data: %s\n",
(fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
return r;
}
////////////////////////////////////////////////////////////////////////////////////////////
GrGLSLCaps::GrGLSLCaps() {
this->reset();
}
void GrGLSLCaps::reset() {
INHERITED::reset();
fDropsTileOnZeroDivide = false;
fFBFetchSupport = false;
fFBFetchNeedsCustomOutput = false;
fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
fFBFetchColorName = NULL;
fFBFetchExtensionString = NULL;
}
GrGLSLCaps::GrGLSLCaps(const GrGLSLCaps& caps) : GrShaderCaps() {
*this = caps;
}
GrGLSLCaps& GrGLSLCaps::operator= (const GrGLSLCaps& caps) {
INHERITED::operator=(caps);
fDropsTileOnZeroDivide = caps.fDropsTileOnZeroDivide;
fFBFetchSupport = caps.fFBFetchSupport;
fFBFetchNeedsCustomOutput = caps.fFBFetchNeedsCustomOutput;
fAdvBlendEqInteraction = caps.fAdvBlendEqInteraction;
fFBFetchColorName = caps.fFBFetchColorName;
fFBFetchExtensionString = caps.fFBFetchExtensionString;
return *this;
}
bool GrGLSLCaps::init(const GrGLContextInfo& ctxInfo,
const GrGLInterface* gli,
const GrGLCaps& glCaps) {
this->reset();
if (!ctxInfo.isInitialized()) {
return false;
}
GrGLStandard standard = ctxInfo.standard();
GrGLVersion version = ctxInfo.version();
/**************************************************************************
* Caps specific to GrGLSLCaps
**************************************************************************/
if (kGLES_GrGLStandard == standard) {
if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
fFBFetchNeedsCustomOutput = (version >= GR_GL_VER(3, 0));
fFBFetchSupport = true;
fFBFetchColorName = "gl_LastFragData[0]";
fFBFetchExtensionString = "GL_EXT_shader_framebuffer_fetch";
}
else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
// Actually, we haven't seen an ES3.0 device with this extension yet, so we don't know
fFBFetchNeedsCustomOutput = false;
fFBFetchSupport = true;
fFBFetchColorName = "gl_LastFragData[0]";
fFBFetchExtensionString = "GL_NV_shader_framebuffer_fetch";
}
else if (ctxInfo.hasExtension("GL_ARM_shader_framebuffer_fetch")) {
// The arm extension also requires an additional flag which we will set onResetContext
fFBFetchNeedsCustomOutput = false;
fFBFetchSupport = true;
fFBFetchColorName = "gl_LastFragColorARM";
fFBFetchExtensionString = "GL_ARM_shader_framebuffer_fetch";
}
}
// Adreno GPUs have a tendency to drop tiles when there is a divide-by-zero in a shader
fDropsTileOnZeroDivide = kQualcomm_GrGLVendor == ctxInfo.vendor();
/**************************************************************************
* GrShaderCaps fields
**************************************************************************/
fPathRenderingSupport = ctxInfo.hasExtension("GL_NV_path_rendering");
if (fPathRenderingSupport) {
if (kGL_GrGLStandard == standard) {
// We only support v1.3+ of GL_NV_path_rendering which allows us to
// set individual fragment inputs with ProgramPathFragmentInputGen. The API
// additions are detected by checking the existence of the function.
fPathRenderingSupport = ctxInfo.hasExtension("GL_EXT_direct_state_access") &&
((ctxInfo.version() >= GR_GL_VER(4, 3) ||
ctxInfo.hasExtension("GL_ARB_program_interface_query")) &&
gli->fFunctions.fProgramPathFragmentInputGen);
}
else {
fPathRenderingSupport = ctxInfo.version() >= GR_GL_VER(3, 1);
}
}
// For now these two are equivalent but we could have dst read in shader via some other method
fDstReadInShaderSupport = fFBFetchSupport;
// 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.version() >= GR_GL_VER(3, 0) ||
ctxInfo.hasExtension("GL_OES_standard_derivatives");
}
if (glCaps.advancedBlendEquationSupport()) {
bool coherent = glCaps.advancedCoherentBlendEquationSupport();
if (ctxInfo.hasExtension(coherent ? "GL_NV_blend_equation_advanced_coherent"
: "GL_NV_blend_equation_advanced")) {
fAdvBlendEqInteraction = kAutomatic_AdvBlendEqInteraction;
} else {
fAdvBlendEqInteraction = kGeneralEnable_AdvBlendEqInteraction;
// TODO: Use the following on any platform where "blend_support_all_equations" is slow.
//fAdvBlendEqInteraction = kSpecificEnables_AdvBlendEqInteraction;
}
}
this->initShaderPrecisionTable(ctxInfo, gli);
return true;
}
SkString GrGLSLCaps::dump() const {
SkString r = INHERITED::dump();
static const char* kAdvBlendEqInteractionStr[] = {
"Not Supported",
"Automatic",
"General Enable",
"Specific Enables",
};
GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction);
GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction);
GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction);
GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
r.appendf("--- GLSL-Specific ---\n");
r.appendf("FB Fetch Support: %s\n", (fFBFetchSupport ? "YES" : "NO"));
r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
r.appendf("Advanced blend equation interaction: %s\n",
kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
return r;
}
static GrGLenum precision_to_gl_float_type(GrSLPrecision p) {
switch (p) {
case kLow_GrSLPrecision:
return GR_GL_LOW_FLOAT;
case kMedium_GrSLPrecision:
return GR_GL_MEDIUM_FLOAT;
case kHigh_GrSLPrecision:
return GR_GL_HIGH_FLOAT;
}
SkFAIL("Unknown precision.");
return -1;
}
static GrGLenum shader_type_to_gl_shader(GrShaderType type) {
switch (type) {
case kVertex_GrShaderType:
return GR_GL_VERTEX_SHADER;
case kGeometry_GrShaderType:
return GR_GL_GEOMETRY_SHADER;
case kFragment_GrShaderType:
return GR_GL_FRAGMENT_SHADER;
}
SkFAIL("Unknown shader type.");
return -1;
}
void GrGLSLCaps::initShaderPrecisionTable(const GrGLContextInfo& ctxInfo,
const GrGLInterface* intf) {
if (kGLES_GrGLStandard == ctxInfo.standard() || ctxInfo.version() >= GR_GL_VER(4, 1) ||
ctxInfo.hasExtension("GL_ARB_ES2_compatibility")) {
for (int s = 0; s < kGrShaderTypeCount; ++s) {
if (kGeometry_GrShaderType != s) {
GrShaderType shaderType = static_cast<GrShaderType>(s);
GrGLenum glShader = shader_type_to_gl_shader(shaderType);
PrecisionInfo* first = NULL;
fShaderPrecisionVaries = false;
for (int p = 0; p < kGrSLPrecisionCount; ++p) {
GrSLPrecision precision = static_cast<GrSLPrecision>(p);
GrGLenum glPrecision = precision_to_gl_float_type(precision);
GrGLint range[2];
GrGLint bits;
GR_GL_GetShaderPrecisionFormat(intf, glShader, glPrecision, range, &bits);
if (bits) {
fFloatPrecisions[s][p].fLogRangeLow = range[0];
fFloatPrecisions[s][p].fLogRangeHigh = range[1];
fFloatPrecisions[s][p].fBits = bits;
if (!first) {
first = &fFloatPrecisions[s][p];
}
else if (!fShaderPrecisionVaries) {
fShaderPrecisionVaries = (*first != fFloatPrecisions[s][p]);
}
}
}
}
}
}
else {
// We're on a desktop GL that doesn't have precision info. Assume they're all 32bit float.
fShaderPrecisionVaries = false;
for (int s = 0; s < kGrShaderTypeCount; ++s) {
if (kGeometry_GrShaderType != s) {
for (int p = 0; p < kGrSLPrecisionCount; ++p) {
fFloatPrecisions[s][p].fLogRangeLow = 127;
fFloatPrecisions[s][p].fLogRangeHigh = 127;
fFloatPrecisions[s][p].fBits = 23;
}
}
}
}
// GetShaderPrecisionFormat doesn't accept GL_GEOMETRY_SHADER as a shader type. Assume they're
// the same as the vertex shader. Only fragment shaders were ever allowed to omit support for
// highp. GS was added after GetShaderPrecisionFormat was added to the list of features that
// are recommended against.
if (fGeometryShaderSupport) {
for (int p = 0; p < kGrSLPrecisionCount; ++p) {
fFloatPrecisions[kGeometry_GrShaderType][p] = fFloatPrecisions[kVertex_GrShaderType][p];
}
}
}