Move ETC1 and LATC enums value to GrPixelConfig

src/gpu/gl/GrGLCaps.cpp

 /*
  * 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"
@@ skipping 12 matching lines @@
     fStencilVerifiedColorConfigs.reset();
     fMSFBOType = kNone_MSFBOType;
     fFBFetchType = kNone_FBFetchType;
     fInvalidateFBType = kNone_InvalidateFBType;
     fMapBufferType = kNone_MapBufferType;
     fMaxFragmentUniformVectors = 0;
     fMaxVertexAttributes = 0;
     fMaxFragmentTextureUnits = 0;
     fMaxFixedFunctionTextureCoords = 0;
     fRGBA8RenderbufferSupport = false;
-    fBGRAFormatSupport = false;
     fBGRAIsInternalFormat = false;
     fTextureSwizzleSupport = false;
     fUnpackRowLengthSupport = false;
     fUnpackFlipYSupport = false;
     fPackRowLengthSupport = false;
     fPackFlipYSupport = false;
     fTextureUsageSupport = false;
     fTexStorageSupport = false;
     fTextureRedSupport = false;
     fImagingSupport = false;
@@ skipping 17 matching lines @@
     fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
     fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
     fMaxVertexAttributes = caps.fMaxVertexAttributes;
     fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
     fMaxFixedFunctionTextureCoords = caps.fMaxFixedFunctionTextureCoords;
     fMSFBOType = caps.fMSFBOType;
     fFBFetchType = caps.fFBFetchType;
     fInvalidateFBType = caps.fInvalidateFBType;
     fMapBufferType = caps.fMapBufferType;
     fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
-    fBGRAFormatSupport = caps.fBGRAFormatSupport;
     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;
@@ skipping 46 matching lines @@
 
     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) {
-        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;
-        }
-        SkASSERT(fBGRAFormatSupport ||
-                 kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
-    }
-
-    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;
@@ skipping 93 matching lines @@
 
     // 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
      **************************************************************************/
-    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 (formats[i] == GR_GL_PALETTE8_RGBA8) {
-                f8BitPaletteSupport = true;
-                break;
-            }
-        }
-    }
-
     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
@@ skipping 72 matching lines @@
     } 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);
 
-    this->initCompressedTextureSupport(ctxInfo);
-
     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.
@@ skipping 13 matching lines @@
     // 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 == ctxInfo.standard()) {
+    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 != ctxInfo.standard()) {
+    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->fBGRAFormatSupport) {
+    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 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::initCompressedTextureSupport(const GrGLContextInfo &ctxInfo) {
+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
-    if (kGL_GrGLStandard == standard && version < GR_GL_VER(1, 3)) {
-        return;
-    }
+    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 =
-            version >= GR_GL_VER(4, 3) ||
-            ctxInfo.hasExtension("GL_ARB_ES3_compatibility");
+        hasETC1 = hasCompressTex2D &&
+            (version >= GR_GL_VER(4, 3) || 
+             ctxInfo.hasExtension("GL_ARB_ES3_compatibility"));
     } else {
-        hasETC1 =
-            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"));
+        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")));
     }
-    fCompressedFormatSupport[kETC1_GrCompressedFormat] = hasETC1;
+    fConfigTextureSupport[kETC1_GrPixelConfig] = hasETC1;
 
-    fCompressedFormatSupport[kETC2_GrCompressedFormat] = false;
-    fCompressedFormatSupport[kDXT1_GrCompressedFormat] = false;
+    // 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;
 }
 
 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;
     }
 
@@ skipping 218 matching lines @@
     r.appendf("FB Fetch Type: %s\n", kFBFetchTypeStr[fFBFetchType]);
     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);
     if (!fIsCoreProfile) {
         r.appendf("Max Fixed Function Texture Coords: %d\n", fMaxFixedFunctionTextureCoords);
     }
     r.appendf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
     r.appendf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
-    r.appendf("BGRA support: %s\n", (fBGRAFormatSupport ? "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"));
     r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
     return r;
 }