cc: Adding support for RGBA_4444 tile textures

cc/resources/resource_provider.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/resource_provider.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/containers/hash_tables.h"
@@ skipping 94 matching lines @@
 
 ResourceProvider::Resource::~Resource() {}
 
 ResourceProvider::Resource::Resource(
     unsigned texture_id,
     gfx::Size size,
     GLenum format,
     GLenum filter,
     GLenum texture_pool,
     GLint wrap_mode,
-    TextureUsageHint hint)
+    TextureUsageHint hint,
+    TextureType texture_type)
     : gl_id(texture_id),
       gl_pixel_buffer_id(0),
       gl_upload_query_id(0),
       pixels(NULL),
       pixel_buffer(NULL),
       lock_for_read_count(0),
       imported_count(0),
       exported_count(0),
       locked_for_write(false),
       external(false),
       marked_for_deletion(false),
       pending_set_pixels(false),
       set_pixels_completion_forced(false),
       allocated(false),
       enable_read_lock_fences(false),
       read_lock_fence(NULL),
       size(size),
       format(format),
       filter(filter),
       image_id(0),
       texture_pool(texture_pool),
       wrap_mode(wrap_mode),
       hint(hint),
-      type(GLTexture) {
+      type(GLTexture),
+      texture_type(texture_type) {
   DCHECK(wrap_mode == GL_CLAMP_TO_EDGE || wrap_mode == GL_REPEAT);
 }
 
 ResourceProvider::Resource::Resource(
     uint8_t* pixels,
     gfx::Size size,
     GLenum format,
     GLenum filter,
     GLint wrap_mode)
     : gl_id(0),
@@ skipping 12 matching lines @@
       allocated(false),
       enable_read_lock_fences(false),
       read_lock_fence(NULL),
       size(size),
       format(format),
       filter(filter),
       image_id(0),
       texture_pool(0),
       wrap_mode(wrap_mode),
       hint(TextureUsageAny),
-      type(Bitmap) {
+      type(Bitmap),
+      texture_type(INVALID_TYPE) {
   DCHECK(wrap_mode == GL_CLAMP_TO_EDGE || wrap_mode == GL_REPEAT);
 }
 
 ResourceProvider::Child::Child() {}
 
 ResourceProvider::Child::~Child() {}
 
 scoped_ptr<ResourceProvider> ResourceProvider::Create(
     OutputSurface* output_surface,
     int highp_threshold_min) {
   scoped_ptr<ResourceProvider> resource_provider(
-      new ResourceProvider(output_surface, highp_threshold_min));
+      new ResourceProvider(output_surface,
+                           highp_threshold_min));
 
   bool success = false;
   if (resource_provider->Context3d()) {
     success = resource_provider->InitializeGL();
   } else {
     resource_provider->InitializeSoftware();
     success = true;
   }
 
   if (!success)
     return scoped_ptr<ResourceProvider>();
 
   DCHECK_NE(InvalidType, resource_provider->default_resource_type());
   return resource_provider.Pass();
 }
 
 ResourceProvider::~ResourceProvider() {
   while (!resources_.empty())
     DeleteResourceInternal(resources_.begin(), ForShutdown);
 
   CleanUpGLIfNeeded();
 }
 
 bool ResourceProvider::InUseByConsumer(ResourceId id) {
   Resource* resource = GetResource(id);
   return resource->lock_for_read_count > 0 || resource->exported_count > 0;
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateResource(
-    gfx::Size size, GLenum format, GLint wrap_mode, TextureUsageHint hint) {
+    gfx::Size size,
+    GLenum format,
+    GLint wrap_mode,
+    TextureUsageHint hint,
+    TextureType texture_type) {
   DCHECK(!size.IsEmpty());
   switch (default_resource_type_) {
     case GLTexture:
-      return CreateGLTexture(size, format, GL_TEXTURE_POOL_UNMANAGED_CHROMIUM,
-                             wrap_mode, hint);
+      return CreateGLTexture(size,
+                             format,
+                             GL_TEXTURE_POOL_UNMANAGED_CHROMIUM,
+                             wrap_mode,
+                             hint,
+                             texture_type);
     case Bitmap:
       // The only wrap_mode currently implemented in software mode is
       // GL_CLAMP_TO_EDGE.
       // http://crbug.com/284796
       DCHECK(format == GL_RGBA);
       return CreateBitmap(size);
     case InvalidType:
       break;
   }
 
   LOG(FATAL) << "Invalid default resource type.";
   return 0;
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateManagedResource(
-    gfx::Size size, GLenum format, GLint wrap_mode, TextureUsageHint hint) {
+    gfx::Size size,
+    GLenum format,
+    GLint wrap_mode,
+    TextureUsageHint hint,
+    TextureType texture_type) {
   DCHECK(!size.IsEmpty());
   switch (default_resource_type_) {
     case GLTexture:
-      return CreateGLTexture(size, format, GL_TEXTURE_POOL_MANAGED_CHROMIUM,
-                             wrap_mode, hint);
+      return CreateGLTexture(size,
+                             format,
+                             GL_TEXTURE_POOL_MANAGED_CHROMIUM,
+                             wrap_mode,
+                             hint,
+                             texture_type);
     case Bitmap:
       DCHECK(format == GL_RGBA);
       return CreateBitmap(size);
     case InvalidType:
       break;
   }
 
   LOG(FATAL) << "Invalid default resource type.";
   return 0;
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateGLTexture(
     gfx::Size size,
     GLenum format,
     GLenum texture_pool,
     GLint wrap_mode,
-    TextureUsageHint hint) {
+    TextureUsageHint hint,
+    TextureType texture_type) {
   DCHECK_LE(size.width(), max_texture_size_);
   DCHECK_LE(size.height(), max_texture_size_);
   DCHECK(thread_checker_.CalledOnValidThread());
 
   ResourceId id = next_id_++;
-  Resource resource(0, size, format, GL_LINEAR, texture_pool, wrap_mode, hint);
+  Resource resource(
+      0, size, format, GL_LINEAR, texture_pool, wrap_mode, hint, texture_type);
   resource.allocated = false;
   resources_[id] = resource;
   return id;
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateBitmap(gfx::Size size) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   uint8_t* pixels = new uint8_t[4 * size.GetArea()];
 
@@ skipping 16 matching lines @@
   GLC(context3d, context3d->texParameteri(
       texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
   GLC(context3d, context3d->texParameteri(
       texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
   GLC(context3d, context3d->texParameteri(
       texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
   GLC(context3d, context3d->texParameteri(
       texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
 
   ResourceId id = next_id_++;
-  Resource resource(texture_id, gfx::Size(), 0, GL_LINEAR, 0, GL_CLAMP_TO_EDGE,
-                    TextureUsageAny);
+  Resource resource(texture_id,
+                    gfx::Size(),
+                    0,
+                    GL_LINEAR,
+                    0,
+                    GL_CLAMP_TO_EDGE,
+                    TextureUsageAny,
+                    INVALID_TYPE);
   resource.external = true;
   resource.allocated = true;
   resources_[id] = resource;
   return id;
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateResourceFromTextureMailbox(
     const TextureMailbox& mailbox) {
   DCHECK(thread_checker_.CalledOnValidThread());
   // Just store the information. Mailbox will be consumed in LockForRead().
   ResourceId id = next_id_++;
   DCHECK(mailbox.IsValid());
   Resource& resource = resources_[id];
   if (mailbox.IsTexture()) {
-    resource = Resource(0, gfx::Size(), 0, GL_LINEAR, 0, GL_CLAMP_TO_EDGE,
-                        TextureUsageAny);
+    resource = Resource(0,
+                        gfx::Size(),
+                        0,
+                        GL_LINEAR,
+                        0,
+                        GL_CLAMP_TO_EDGE,
+                        TextureUsageAny,
+                        INVALID_TYPE);
   } else {
     DCHECK(mailbox.IsSharedMemory());
     base::SharedMemory* shared_memory = mailbox.shared_memory();
     DCHECK(shared_memory->memory());
     uint8_t* pixels = reinterpret_cast<uint8_t*>(shared_memory->memory());
     resource = Resource(pixels, mailbox.shared_memory_size(),
                         GL_RGBA, GL_LINEAR, GL_CLAMP_TO_EDGE);
   }
   resource.external = true;
   resource.allocated = true;
@@ skipping 98 matching lines @@
     DCHECK(!resource->pending_set_pixels);
     WebGraphicsContext3D* context3d = Context3d();
     DCHECK(context3d);
     DCHECK(texture_uploader_.get());
     context3d->bindTexture(GL_TEXTURE_2D, resource->gl_id);
     texture_uploader_->Upload(image,
                               image_rect,
                               source_rect,
                               dest_offset,
                               resource->format,
-                              resource->size);
+                              resource->size,
+                              resource->texture_type);
   }
 
   if (resource->pixels) {
     DCHECK(resource->allocated);
     DCHECK(resource->format == GL_RGBA);
     SkBitmap src_full;
     src_full.setConfig(
         SkBitmap::kARGB_8888_Config, image_rect.width(), image_rect.height());
     src_full.setPixels(const_cast<uint8_t*>(image));
     SkBitmap src_subset;
@@ skipping 292 matching lines @@
   const ContextProvider::Capabilities& caps =
       output_surface_->context_provider()->ContextCapabilities();
 
   bool use_map_sub = caps.map_sub;
   bool use_bgra = caps.texture_format_bgra8888;
   use_texture_storage_ext_ = caps.texture_storage;
   use_shallow_flush_ = caps.shallow_flush;
   use_texture_usage_hint_ = caps.texture_usage;
 
   texture_uploader_ =
-      TextureUploader::Create(context3d, use_map_sub, use_shallow_flush_);
+      TextureUploader::Create(context3d,
+                              use_map_sub,
+                              use_shallow_flush_);
   GLC(context3d, context3d->getIntegerv(GL_MAX_TEXTURE_SIZE,
                                         &max_texture_size_));
   best_texture_format_ = PlatformColor::BestTextureFormat(use_bgra);
 
   return true;
 }
 
 void ResourceProvider::CleanUpGLIfNeeded() {
   WebGraphicsContext3D* context3d = Context3d();
   if (default_resource_type_ != GLTexture) {
@@ skipping 144 matching lines @@
     // However if the parent is a renderer (e.g. browser tag), it may be ok
     // (and is simpler) to wait.
     if (it->sync_point)
       GLC(context3d, context3d->waitSyncPoint(it->sync_point));
     GLC(context3d, texture_id = context3d->createTexture());
     GLC(context3d, context3d->bindTexture(GL_TEXTURE_2D, texture_id));
     GLC(context3d, context3d->consumeTextureCHROMIUM(GL_TEXTURE_2D,
                                                      it->mailbox.name));
     ResourceId id = next_id_++;
     Resource resource(
-        texture_id, it->size, it->format, it->filter, 0, GL_CLAMP_TO_EDGE,
-        TextureUsageAny);
+        texture_id,
+        it->size,
+        it->format,
+        it->filter,
+        0,
+        GL_CLAMP_TO_EDGE,
+        TextureUsageAny,
+        static_cast<TextureType>(it->texture_type));
     resource.mailbox.SetName(it->mailbox);
     // Don't allocate a texture for a child.
     resource.allocated = true;
     resource.imported_count = 1;
     resources_[id] = resource;
     child_info.parent_to_child_map[id] = it->id;
     child_info.child_to_parent_map[it->id] = id;
   }
 }
 
@@ skipping 34 matching lines @@
                                         TransferableResource* resource) {
   Resource* source = GetResource(id);
   DCHECK(!source->locked_for_write);
   DCHECK(!source->lock_for_read_count);
   DCHECK(!source->external || (source->external && source->mailbox.IsValid()));
   DCHECK(source->allocated);
   resource->id = id;
   resource->format = source->format;
   resource->filter = source->filter;
   resource->size = source->size;
+  resource->texture_type = source->texture_type;
 
   // TODO(skaslev) Implement this path for shared memory resources.
   DCHECK(!source->mailbox.IsSharedMemory());
 
   if (!source->mailbox.IsTexture()) {
     // This is a resource allocated by the compositor, we need to produce it.
     // Don't set a sync point, the caller will do it.
     DCHECK(source->gl_id);
     GLC(context, context->bindTexture(GL_TEXTURE_2D, source->gl_id));
     GLC(context, context->genMailboxCHROMIUM(resource->mailbox.name));
@@ skipping 16 matching lines @@
   DCHECK(!resource->image_id);
 
   if (resource->type == GLTexture) {
     WebGraphicsContext3D* context3d = Context3d();
     DCHECK(context3d);
     if (!resource->gl_pixel_buffer_id)
       resource->gl_pixel_buffer_id = context3d->createBuffer();
     context3d->bindBuffer(
         GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM,
         resource->gl_pixel_buffer_id);
+    size_t bytes_per_pixel =
+        BytesPerPixel(best_texture_format_, resource->texture_type);
     context3d->bufferData(
         GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM,
-        4 * resource->size.GetArea(),
+        bytes_per_pixel * resource->size.GetArea(),
         NULL,
         GL_DYNAMIC_DRAW);
     context3d->bindBuffer(GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM, 0);
   }
 
   if (resource->pixels) {
     if (resource->pixel_buffer)
       return;
 
     resource->pixel_buffer = new uint8_t[4 * resource->size.GetArea()];
@@ skipping 150 matching lines @@
     DCHECK(resource->gl_pixel_buffer_id);
     context3d->bindTexture(GL_TEXTURE_2D, resource->gl_id);
     context3d->bindBuffer(
         GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM,
         resource->gl_pixel_buffer_id);
     if (!resource->gl_upload_query_id)
       resource->gl_upload_query_id = context3d->createQueryEXT();
     context3d->beginQueryEXT(
         GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM,
         resource->gl_upload_query_id);
+    GLenum texture_data_type = GetTextureDataType(resource->texture_type);
     if (allocate) {
       context3d->asyncTexImage2DCHROMIUM(GL_TEXTURE_2D,
                                          0, /* level */
                                          resource->format,
                                          resource->size.width(),
                                          resource->size.height(),
                                          0, /* border */
                                          resource->format,
-                                         GL_UNSIGNED_BYTE,
+                                         texture_data_type,
                                          NULL);
     } else {
       context3d->asyncTexSubImage2DCHROMIUM(GL_TEXTURE_2D,
                                             0, /* level */
                                             0, /* x */
                                             0, /* y */
                                             resource->size.width(),
                                             resource->size.height(),
                                             resource->format,
-                                            GL_UNSIGNED_BYTE,
+                                            texture_data_type,
                                             NULL);
     }
     context3d->endQueryEXT(GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM);
     context3d->bindBuffer(GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM, 0);
   }
 
   if (resource->pixels) {
     DCHECK(!resource->mailbox.IsValid());
     DCHECK(resource->pixel_buffer);
     DCHECK(resource->format == GL_RGBA);
@@ skipping 112 matching lines @@
                                               size.width(),
                                               size.height()));
   } else {
     GLC(context3d, context3d->texImage2D(GL_TEXTURE_2D,
                                          0,
                                          format,
                                          size.width(),
                                          size.height(),
                                          0,
                                          format,
-                                         GL_UNSIGNED_BYTE,
+                                         GetTextureDataType(
+                                             resource->texture_type),
                                          NULL));
   }
 }
 
 void ResourceProvider::EnableReadLockFences(ResourceProvider::ResourceId id,
                                             bool enable) {
   Resource* resource = GetResource(id);
   resource->enable_read_lock_fences = enable;
 }
 
@@ skipping 84 matching lines @@
   GLint active_unit = 0;
   context->getIntegerv(GL_ACTIVE_TEXTURE, &active_unit);
   return active_unit;
 }
 
 WebKit::WebGraphicsContext3D* ResourceProvider::Context3d() const {
   ContextProvider* context_provider = output_surface_->context_provider();
   return context_provider ? context_provider->Context3d() : NULL;
 }
 
+size_t ResourceProvider::BytesPerPixel(GLenum format, TextureType type) {
+  size_t components_per_pixel = 0;
+  switch (format) {
+    case GL_RGBA:
+      components_per_pixel = 4;
+      break;
+    case GL_BGRA_EXT:
+      components_per_pixel = 4;
+      break;
+    case GL_LUMINANCE:
+      components_per_pixel = 1;
+      break;
+    default:
+      NOTREACHED();
+  }
+  size_t bits_per_component = 0;
+  switch (type) {
+    case RGBA_8888:
+    case BGRA_8888:
+      bits_per_component = 8;
+      break;
+    case RGBA_4444:
+      bits_per_component = 4;
+      break;
+    default:
+      NOTREACHED();
+  }
+  const size_t kBitsPerByte = 8;
+  return (components_per_pixel * bits_per_component) / kBitsPerByte;
+}
+
+GLenum ResourceProvider::GetTextureDataType(GLenum texture_type) {
+  GLenum texture_data_type = GL_UNSIGNED_BYTE;
+  switch (texture_type) {
+  case RGBA_4444:
+    texture_data_type = GL_UNSIGNED_SHORT_4_4_4_4;
+    break;
+  case RGBA_8888:
+    texture_data_type = GL_UNSIGNED_BYTE;
+    break;
+  default:
+    NOTREACHED();
+    break;
+  }
+  return texture_data_type;
+}
+
 }  // namespace cc