skia: Add support for CHROMIUM_image backed textures.

src/gpu/gl/GrGLGpu.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLGpu.h"
 #include "GrGLGLSL.h"
@@ skipping 466 matching lines @@
         case kBorrow_GrWrapOwnership:
             idDesc.fLifeCycle = GrGpuResource::kBorrowed_LifeCycle;
             break;
     }
 
     surfDesc.fFlags = (GrSurfaceFlags) desc.fFlags;
     surfDesc.fWidth = desc.fWidth;
     surfDesc.fHeight = desc.fHeight;
     surfDesc.fConfig = desc.fConfig;
     surfDesc.fSampleCnt = SkTMin(desc.fSampleCnt, this->caps()->maxSampleCount());
+    surfDesc.fTextureStorageAllocator = desc.fTextureStorageAllocator;
     // FIXME:  this should be calling resolve_origin(), but Chrome code is currently
     // assuming the old behaviour, which is that backend textures are always
     // BottomLeft, even for non-RT's.  Once Chrome is fixed, change this to:
     // glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
     if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
         surfDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
     } else {
         surfDesc.fOrigin = desc.fOrigin;
     }
 
@@ skipping 145 matching lines @@
     this->setScratchTextureUnit();
     GL_CALL(BindTexture(glTex->target(), glTex->textureID()));
 
     bool success = false;
     if (GrPixelConfigIsCompressed(glTex->desc().fConfig)) {
         // We check that config == desc.fConfig in GrGLGpu::canWriteTexturePixels()
         SkASSERT(config == glTex->desc().fConfig);
         success = this->uploadCompressedTexData(glTex->desc(), glTex->target(), buffer, 
                                                 kWrite_UploadType, left, top, width, height);
     } else {
-        success = this->uploadTexData(glTex->desc(), glTex->target(), kWrite_UploadType,
-                                      left, top, width, height, config, buffer, rowBytes);
+      success = this->uploadTexData(
+          glTex->desc(),
+          reinterpret_cast<GrGLTextureInfo*>(glTex->getTextureHandle()),
+          kWrite_UploadType, left, top, width, height, config, buffer,
+          rowBytes);
     }
 
     if (success) {
         glTex->texturePriv().dirtyMipMaps(true);
         return true;
     }
 
     return false;
 }
 
@@ skipping 16 matching lines @@
     GL_CALL(BindTexture(glTex->target(), glTex->textureID()));
 
     SkASSERT(!buffer->isMapped());
     GrGLTransferBuffer* glBuffer = reinterpret_cast<GrGLTransferBuffer*>(buffer);
     // bind the transfer buffer
     SkASSERT(GR_GL_PIXEL_UNPACK_BUFFER == glBuffer->bufferType() ||
              GR_GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM == glBuffer->bufferType());
     GL_CALL(BindBuffer(glBuffer->bufferType(), glBuffer->bufferID()));
 
     bool success = false;
-    success = this->uploadTexData(glTex->desc(), glTex->target(), kTransfer_UploadType,
-                                  left, top, width, height, config, buffer, rowBytes);
+    success = this->uploadTexData(
+        glTex->desc(),
+        reinterpret_cast<GrGLTextureInfo*>(glTex->getTextureHandle()),
+        kTransfer_UploadType, left, top, width, height, config, buffer,
+        rowBytes);
 
     if (success) {
         glTex->texturePriv().dirtyMipMaps(true);
         return true;
     }
 
     return false;
 }
 
 // For GL_[UN]PACK_ALIGNMENT.
@@ skipping 20 matching lines @@
 static inline GrGLenum check_alloc_error(const GrSurfaceDesc& desc,
                                          const GrGLInterface* interface) {
     if (SkToBool(desc.fFlags & kCheckAllocation_GrSurfaceFlag)) {
         return GR_GL_GET_ERROR(interface);
     } else {
         return CHECK_ALLOC_ERROR(interface);
     }
 }
 
 bool GrGLGpu::uploadTexData(const GrSurfaceDesc& desc,
-                            GrGLenum target,
+                            GrGLTextureInfo* info,
                             UploadType uploadType,
                             int left, int top, int width, int height,
                             GrPixelConfig dataConfig,
                             const void* dataOrOffset,
                             size_t rowBytes) {
     SkASSERT(dataOrOffset || kNewTexture_UploadType == uploadType || 
              kTransfer_UploadType == uploadType);
 
     // If we're uploading compressed data then we should be using uploadCompressedTexData
     SkASSERT(!GrPixelConfigIsCompressed(dataConfig));
@@ skipping 76 matching lines @@
             GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_TRUE));
         }
         GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, config_alignment(dataConfig)));
     }
     bool succeeded = true;
     if (kNewTexture_UploadType == uploadType) {
         if (dataOrOffset && 
             !(0 == left && 0 == top && desc.fWidth == width && desc.fHeight == height)) {
             succeeded = false;
         } else {
-            CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
-            GL_ALLOC_CALL(this->glInterface(), TexImage2D(target, 0, internalFormat, desc.fWidth,
-                                                          desc.fHeight, 0, externalFormat,
-                                                          externalType, dataOrOffset));
-            GrGLenum error = check_alloc_error(desc, this->glInterface());
-            if (error != GR_GL_NO_ERROR) {
-                succeeded = false;
-            }
+            if (desc.fTextureStorageAllocator) {                                    
+                succeeded = desc.fTextureStorageAllocator->allocateTextureStorage(
+                    info->fID, width, height);
+                if (succeeded && dataOrOffset) {
+                    GL_CALL(TexSubImage2D(info->fTarget,
+                                          0, // level
+                                          left, top,
+                                          width, height,
+                                          externalFormat, externalType, dataOrOffset));
+                }
+            } else {                                                              
+                CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());                    
+                GL_ALLOC_CALL(this->glInterface(), TexImage2D(                    
+                    info->fTarget, 0, internalFormat, desc.fWidth, desc.fHeight, 0, externalFormat,
+                    externalType, dataOrOffset));                                 
+                GrGLenum error = check_alloc_error(desc, this->glInterface()); 
+                if (error != GR_GL_NO_ERROR) {                                    
+                    succeeded = false;                                            
+                }
+            }  
         }
     } else {
         if (swFlipY || glFlipY) {
             top = desc.fHeight - (top + height);
         }
-        GL_CALL(TexSubImage2D(target,
+        GL_CALL(TexSubImage2D(info->fTarget,
                               0, // level
                               left, top,
                               width, height,
                               externalFormat, externalType, dataOrOffset));
     }
 
     if (restoreGLRowLength) {
         SkASSERT(this->glCaps().unpackRowLengthSupport());
         GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
     }
@@ skipping 245 matching lines @@
         //SkDebugf("MSAA RT requested but not supported on this platform.");
         return return_null_texture();
     }
 
     bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag);
 
     GrGLTexture::IDDesc idDesc;
     idDesc.fInfo.fID = 0;
     GL_CALL(GenTextures(1, &idDesc.fInfo.fID));
     idDesc.fLifeCycle = lifeCycle;
-    // We only support GL_TEXTURE_2D at the moment.
-    idDesc.fInfo.fTarget = GR_GL_TEXTURE_2D;
+
+    if (desc.fTextureStorageAllocator) {                                         
+        idDesc.fInfo.fTarget = desc.fTextureStorageAllocator->textureStorageTarget();
+    } else {                                                                   
+        idDesc.fInfo.fTarget = GR_GL_TEXTURE_2D;                               
+    }                                                 
 
     if (!idDesc.fInfo.fID) {
         return return_null_texture();
     }
 
     this->setScratchTextureUnit();
     GL_CALL(BindTexture(idDesc.fInfo.fTarget, idDesc.fInfo.fID));
 
     if (renderTarget && this->glCaps().textureUsageSupport()) {
         // provides a hint about how this texture will be used
@@ skipping 17 matching lines @@
                           initialTexParams.fMagFilter));
     GL_CALL(TexParameteri(idDesc.fInfo.fTarget,
                           GR_GL_TEXTURE_MIN_FILTER,
                           initialTexParams.fMinFilter));
     GL_CALL(TexParameteri(idDesc.fInfo.fTarget,
                           GR_GL_TEXTURE_WRAP_S,
                           initialTexParams.fWrapS));
     GL_CALL(TexParameteri(idDesc.fInfo.fTarget,
                           GR_GL_TEXTURE_WRAP_T,
                           initialTexParams.fWrapT));
-    if (!this->uploadTexData(desc, idDesc.fInfo.fTarget, kNewTexture_UploadType, 0, 0,
+    if (!this->uploadTexData(desc, &idDesc.fInfo, kNewTexture_UploadType, 0, 0,
                              desc.fWidth, desc.fHeight,
                              desc.fConfig, srcData, rowBytes)) {
         GL_CALL(DeleteTextures(1, &idDesc.fInfo.fID));
         return return_null_texture();
     }
 
     GrGLTexture* tex;
     if (renderTarget) {
         // unbind the texture from the texture unit before binding it to the frame buffer
         GL_CALL(BindTexture(idDesc.fInfo.fTarget, 0));
@@ skipping 2398 matching lines @@
         if (GR_GL_TEXTURE_EXTERNAL == glTexture->target() ||
             GR_GL_TEXTURE_RECTANGLE == glTexture->target()) {
             copyParams->fFilter = GrTextureParams::kNone_FilterMode;
             copyParams->fWidth = texture->width();
             copyParams->fHeight = texture->height();
             return true;
         }
     }
     return false;
 }