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// Copyright 2020 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 "third_party/blink/renderer/platform/graphics/canvas_resource_params.h"
#include "cc/paint/skia_paint_canvas.h"
#include "components/viz/common/resources/resource_format_utils.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/khronos/GLES2/gl2ext.h"
#include "third_party/khronos/GLES3/gl3.h"
#include "third_party/skia/include/core/SkSurfaceProps.h"
#include "ui/gfx/color_space.h"
namespace blink {
namespace {
// The CanvasColorSpace value definitions are specified in the CSS Color Level 4
// specification.
gfx::ColorSpace CanvasColorSpaceToGfxColorSpace(CanvasColorSpace color_space) {
switch (color_space) {
case CanvasColorSpace::kSRGB:
return gfx::ColorSpace::CreateSRGB();
break;
case CanvasColorSpace::kRec2020:
return gfx::ColorSpace(gfx::ColorSpace::PrimaryID::BT2020,
gfx::ColorSpace::TransferID::GAMMA24);
break;
case CanvasColorSpace::kP3:
return gfx::ColorSpace::CreateDisplayP3D65();
break;
}
NOTREACHED();
}
} // namespace
CanvasResourceParams::CanvasResourceParams() = default;
CanvasResourceParams::CanvasResourceParams(CanvasColorSpace color_space,
SkColorType color_type,
SkAlphaType alpha_type)
: color_space_(color_space),
color_type_(color_type),
alpha_type_(alpha_type) {}
CanvasResourceParams::CanvasResourceParams(const SkImageInfo& info)
: CanvasResourceParams(info.refColorSpace(), info.colorType()) {
// TODO(https://crbug.com/1157747): This ignores |info|'s SkAlphaType.
}
const SkSurfaceProps* CanvasResourceParams::GetSkSurfaceProps() const {
static const SkSurfaceProps disable_lcd_props(0, kUnknown_SkPixelGeometry);
if (alpha_type_ == kOpaque_SkAlphaType)
return nullptr;
return &disable_lcd_props;
}
uint8_t CanvasResourceParams::BytesPerPixel() const {
return SkColorTypeBytesPerPixel(color_type_);
}
gfx::ColorSpace CanvasResourceParams::GetSamplerGfxColorSpace() const {
// TODO(ccameron): If we add support for uint8srgb as a pixel format, this
// will need to take into account whether or not this texture will be sampled
// in linear or nonlinear space.
return CanvasColorSpaceToGfxColorSpace(color_space_);
}
gfx::ColorSpace CanvasResourceParams::GetStorageGfxColorSpace() const {
return CanvasColorSpaceToGfxColorSpace(color_space_);
}
sk_sp<SkColorSpace> CanvasResourceParams::GetSkColorSpace() const {
static_assert(kN32_SkColorType == kRGBA_8888_SkColorType ||
kN32_SkColorType == kBGRA_8888_SkColorType,
"Unexpected kN32_SkColorType value.");
return CanvasColorSpaceToSkColorSpace(color_space_);
}
gfx::BufferFormat CanvasResourceParams::GetBufferFormat() const {
switch (color_type_) {
case kRGBA_F16_SkColorType:
return gfx::BufferFormat::RGBA_F16;
case kRGBA_8888_SkColorType:
return gfx::BufferFormat::RGBA_8888;
case kBGRA_8888_SkColorType:
return gfx::BufferFormat::BGRA_8888;
case kRGB_888x_SkColorType:
return gfx::BufferFormat::RGBX_8888;
default:
NOTREACHED();
}
return gfx::BufferFormat::RGBA_8888;
}
GLenum CanvasResourceParams::GLSizedInternalFormat() const {
switch (color_type_) {
case kRGBA_F16_SkColorType:
return GL_RGBA16F;
case kRGBA_8888_SkColorType:
return GL_RGBA8;
case kBGRA_8888_SkColorType:
return GL_BGRA8_EXT;
case kRGB_888x_SkColorType:
return GL_RGB8;
default:
NOTREACHED();
}
return GL_RGBA8;
}
GLenum CanvasResourceParams::GLType() const {
switch (color_type_) {
case kRGBA_F16_SkColorType:
return GL_HALF_FLOAT_OES;
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType:
case kRGB_888x_SkColorType:
return GL_UNSIGNED_BYTE;
default:
NOTREACHED();
}
return GL_UNSIGNED_BYTE;
}
viz::ResourceFormat CanvasResourceParams::TransferableResourceFormat() const {
return viz::GetResourceFormat(GetBufferFormat());
}
CanvasResourceParams::CanvasResourceParams(
const sk_sp<SkColorSpace> sk_color_space,
SkColorType sk_color_type) {
color_space_ = CanvasColorSpaceFromSkColorSpace(sk_color_space.get());
color_type_ = kN32_SkColorType;
if (sk_color_type == kRGBA_F16_SkColorType ||
sk_color_type == kRGBA_8888_SkColorType ||
sk_color_type == kRGB_888x_SkColorType) {
color_type_ = sk_color_type;
}
}
} // namespace blink
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