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Unified Diff: cc/render_surface_filters.cc

Issue 12912006: Part 4 of cc/ directory shuffles: output (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 9 months ago
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Index: cc/render_surface_filters.cc
diff --git a/cc/render_surface_filters.cc b/cc/render_surface_filters.cc
deleted file mode 100644
index 8f61c698512f4e606ec1db3b167bb97d804f102e..0000000000000000000000000000000000000000
--- a/cc/render_surface_filters.cc
+++ /dev/null
@@ -1,461 +0,0 @@
-// 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/render_surface_filters.h"
-
-#include "base/logging.h"
-#include "skia/ext/refptr.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperation.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/effects/SkBlurImageFilter.h"
-#include "third_party/skia/include/effects/SkColorMatrixFilter.h"
-#include "third_party/skia/include/effects/SkMagnifierImageFilter.h"
-#include "third_party/skia/include/gpu/SkGpuDevice.h"
-#include "third_party/skia/include/gpu/SkGrPixelRef.h"
-#include "ui/gfx/size_f.h"
-
-namespace cc {
-
-namespace {
-
-void GetBrightnessMatrix(float amount, SkScalar matrix[20]) {
- // Spec implementation
- // (http://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#brightnessEquivalent)
- // <feFunc[R|G|B] type="linear" slope="[amount]">
- memset(matrix, 0, 20 * sizeof(SkScalar));
- matrix[0] = matrix[6] = matrix[12] = amount;
- matrix[18] = 1.f;
-}
-
-void GetSaturatingBrightnessMatrix(float amount, SkScalar matrix[20]) {
- // Legacy implementation used by internal clients.
- // <feFunc[R|G|B] type="linear" intercept="[amount]"/>
- memset(matrix, 0, 20 * sizeof(SkScalar));
- matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f;
- matrix[4] = matrix[9] = matrix[14] = amount * 255.f;
-}
-
-void GetContrastMatrix(float amount, SkScalar matrix[20]) {
- memset(matrix, 0, 20 * sizeof(SkScalar));
- matrix[0] = matrix[6] = matrix[12] = amount;
- matrix[4] = matrix[9] = matrix[14] = (-0.5f * amount + 0.5f) * 255.f;
- matrix[18] = 1.f;
-}
-
-void GetSaturateMatrix(float amount, SkScalar matrix[20]) {
- // Note, these values are computed to ensure matrixNeedsClamping is false
- // for amount in [0..1]
- matrix[0] = 0.213f + 0.787f * amount;
- matrix[1] = 0.715f - 0.715f * amount;
- matrix[2] = 1.f - (matrix[0] + matrix[1]);
- matrix[3] = matrix[4] = 0.f;
- matrix[5] = 0.213f - 0.213f * amount;
- matrix[6] = 0.715f + 0.285f * amount;
- matrix[7] = 1.f - (matrix[5] + matrix[6]);
- matrix[8] = matrix[9] = 0.f;
- matrix[10] = 0.213f - 0.213f * amount;
- matrix[11] = 0.715f - 0.715f * amount;
- matrix[12] = 1.f - (matrix[10] + matrix[11]);
- matrix[13] = matrix[14] = 0.f;
- matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f;
- matrix[18] = 1.f;
-}
-
-void GetHueRotateMatrix(float hue, SkScalar matrix[20]) {
- const float kPi = 3.1415926535897932384626433832795f;
-
- float cos_hue = cosf(hue * kPi / 180.f);
- float sin_hue = sinf(hue * kPi / 180.f);
- matrix[0] = 0.213f + cos_hue * 0.787f - sin_hue * 0.213f;
- matrix[1] = 0.715f - cos_hue * 0.715f - sin_hue * 0.715f;
- matrix[2] = 0.072f - cos_hue * 0.072f + sin_hue * 0.928f;
- matrix[3] = matrix[4] = 0.f;
- matrix[5] = 0.213f - cos_hue * 0.213f + sin_hue * 0.143f;
- matrix[6] = 0.715f + cos_hue * 0.285f + sin_hue * 0.140f;
- matrix[7] = 0.072f - cos_hue * 0.072f - sin_hue * 0.283f;
- matrix[8] = matrix[9] = 0.f;
- matrix[10] = 0.213f - cos_hue * 0.213f - sin_hue * 0.787f;
- matrix[11] = 0.715f - cos_hue * 0.715f + sin_hue * 0.715f;
- matrix[12] = 0.072f + cos_hue * 0.928f + sin_hue * 0.072f;
- matrix[13] = matrix[14] = 0.f;
- matrix[15] = matrix[16] = matrix[17] = 0.f;
- matrix[18] = 1.f;
- matrix[19] = 0.f;
-}
-
-void GetInvertMatrix(float amount, SkScalar matrix[20]) {
- memset(matrix, 0, 20 * sizeof(SkScalar));
- matrix[0] = matrix[6] = matrix[12] = 1.f - 2.f * amount;
- matrix[4] = matrix[9] = matrix[14] = amount * 255.f;
- matrix[18] = 1.f;
-}
-
-void GetOpacityMatrix(float amount, SkScalar matrix[20]) {
- memset(matrix, 0, 20 * sizeof(SkScalar));
- matrix[0] = matrix[6] = matrix[12] = 1.f;
- matrix[18] = amount;
-}
-
-void GetGrayscaleMatrix(float amount, SkScalar matrix[20]) {
- // Note, these values are computed to ensure matrixNeedsClamping is false
- // for amount in [0..1]
- matrix[0] = 0.2126f + 0.7874f * amount;
- matrix[1] = 0.7152f - 0.7152f * amount;
- matrix[2] = 1.f - (matrix[0] + matrix[1]);
- matrix[3] = matrix[4] = 0.f;
-
- matrix[5] = 0.2126f - 0.2126f * amount;
- matrix[6] = 0.7152f + 0.2848f * amount;
- matrix[7] = 1.f - (matrix[5] + matrix[6]);
- matrix[8] = matrix[9] = 0.f;
-
- matrix[10] = 0.2126f - 0.2126f * amount;
- matrix[11] = 0.7152f - 0.7152f * amount;
- matrix[12] = 1.f - (matrix[10] + matrix[11]);
- matrix[13] = matrix[14] = 0.f;
-
- matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f;
- matrix[18] = 1.f;
-}
-
-void GetSepiaMatrix(float amount, SkScalar matrix[20]) {
- matrix[0] = 0.393f + 0.607f * amount;
- matrix[1] = 0.769f - 0.769f * amount;
- matrix[2] = 0.189f - 0.189f * amount;
- matrix[3] = matrix[4] = 0.f;
-
- matrix[5] = 0.349f - 0.349f * amount;
- matrix[6] = 0.686f + 0.314f * amount;
- matrix[7] = 0.168f - 0.168f * amount;
- matrix[8] = matrix[9] = 0.f;
-
- matrix[10] = 0.272f - 0.272f * amount;
- matrix[11] = 0.534f - 0.534f * amount;
- matrix[12] = 0.131f + 0.869f * amount;
- matrix[13] = matrix[14] = 0.f;
-
- matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f;
- matrix[18] = 1.f;
-}
-
-// The 5x4 matrix is really a "compressed" version of a 5x5 matrix that'd have
-// (0 0 0 0 1) as a last row, and that would be applied to a 5-vector extended
-// from the 4-vector color with a 1.
-void MultColorMatrix(SkScalar a[20], SkScalar b[20], SkScalar out[20]) {
- for (int j = 0; j < 4; ++j) {
- for (int i = 0; i < 5; ++i) {
- out[i+j*5] = i == 4 ? a[4+j*5] : 0.f;
- for (int k = 0; k < 4; ++k)
- out[i+j*5] += a[k+j*5] * b[i+k*5];
- }
- }
-}
-
-// To detect if we need to apply clamping after applying a matrix, we check if
-// any output component might go outside of [0, 255] for any combination of
-// input components in [0..255].
-// Each output component is an affine transformation of the input component, so
-// the minimum and maximum values are for any combination of minimum or maximum
-// values of input components (i.e. 0 or 255).
-// E.g. if R' = x*R + y*G + z*B + w*A + t
-// Then the maximum value will be for R=255 if x>0 or R=0 if x<0, and the
-// minimum value will be for R=0 if x>0 or R=255 if x<0.
-// Same goes for all components.
-bool ComponentNeedsClamping(SkScalar row[5]) {
- SkScalar max_value = row[4] / 255.f;
- SkScalar min_value = row[4] / 255.f;
- for (int i = 0; i < 4; ++i) {
- if (row[i] > 0)
- max_value += row[i];
- else
- min_value += row[i];
- }
- return (max_value > 1.f) || (min_value < 0.f);
-}
-
-bool MatrixNeedsClamping(SkScalar matrix[20]) {
- return ComponentNeedsClamping(matrix)
- || ComponentNeedsClamping(matrix+5)
- || ComponentNeedsClamping(matrix+10)
- || ComponentNeedsClamping(matrix+15);
-}
-
-bool GetColorMatrix(const WebKit::WebFilterOperation& op, SkScalar matrix[20]) {
- switch (op.type()) {
- case WebKit::WebFilterOperation::FilterTypeBrightness: {
- GetBrightnessMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeSaturatingBrightness: {
- GetSaturatingBrightnessMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeContrast: {
- GetContrastMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeGrayscale: {
- GetGrayscaleMatrix(1.f - op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeSepia: {
- GetSepiaMatrix(1.f - op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeSaturate: {
- GetSaturateMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeHueRotate: {
- GetHueRotateMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeInvert: {
- GetInvertMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeOpacity: {
- GetOpacityMatrix(op.amount(), matrix);
- return true;
- }
- case WebKit::WebFilterOperation::FilterTypeColorMatrix: {
- memcpy(matrix, op.matrix(), sizeof(SkScalar[20]));
- return true;
- }
- default:
- return false;
- }
-}
-
-class FilterBufferState {
- public:
- FilterBufferState(GrContext* gr_context,
- gfx::SizeF size,
- unsigned texture_id)
- : gr_context_(gr_context),
- current_texture_(0) {
- // Wrap the source texture in a Ganesh platform texture.
- GrBackendTextureDesc backend_texture_description;
- backend_texture_description.fWidth = size.width();
- backend_texture_description.fHeight = size.height();
- backend_texture_description.fConfig = kSkia8888_GrPixelConfig;
- backend_texture_description.fTextureHandle = texture_id;
- skia::RefPtr<GrTexture> texture = skia::AdoptRef(
- gr_context->wrapBackendTexture(backend_texture_description));
- // Place the platform texture inside an SkBitmap.
- source_.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
- skia::RefPtr<SkGrPixelRef> pixel_ref =
- skia::AdoptRef(new SkGrPixelRef(texture.get()));
- source_.setPixelRef(pixel_ref.get());
- }
-
- ~FilterBufferState() {}
-
- bool Init(int filter_count) {
- int scratch_count = std::min(2, filter_count);
- GrTextureDesc desc;
- desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
- desc.fSampleCnt = 0;
- desc.fWidth = source_.width();
- desc.fHeight = source_.height();
- desc.fConfig = kSkia8888_GrPixelConfig;
- for (int i = 0; i < scratch_count; ++i) {
- GrAutoScratchTexture scratch_texture(
- gr_context_, desc, GrContext::kExact_ScratchTexMatch);
- scratch_textures_[i] = skia::AdoptRef(scratch_texture.detach());
- if (!scratch_textures_[i])
- return false;
- }
- return true;
- }
-
- SkCanvas* Canvas() {
- if (!canvas_.get())
- CreateCanvas();
- return canvas_.get();
- }
-
- const SkBitmap& Source() { return source_; }
-
- void Swap() {
- canvas_->flush();
- canvas_.clear();
- device_.clear();
-
- skia::RefPtr<SkGrPixelRef> pixel_ref = skia::AdoptRef(
- new SkGrPixelRef(scratch_textures_[current_texture_].get()));
- source_.setPixelRef(pixel_ref.get());
- current_texture_ = 1 - current_texture_;
- }
-
- private:
- void CreateCanvas() {
- DCHECK(scratch_textures_[current_texture_].get());
- device_ = skia::AdoptRef(new SkGpuDevice(
- gr_context_, scratch_textures_[current_texture_].get()));
- canvas_ = skia::AdoptRef(new SkCanvas(device_.get()));
- canvas_->clear(0x0);
- }
-
- GrContext* gr_context_;
- SkBitmap source_;
- skia::RefPtr<GrTexture> scratch_textures_[2];
- int current_texture_;
- skia::RefPtr<SkGpuDevice> device_;
- skia::RefPtr<SkCanvas> canvas_;
-};
-
-} // namespace
-
-WebKit::WebFilterOperations RenderSurfaceFilters::Optimize(
- const WebKit::WebFilterOperations& filters) {
- WebKit::WebFilterOperations new_list;
-
- SkScalar accumulated_color_matrix[20];
- bool have_accumulated_color_matrix = false;
- for (unsigned i = 0; i < filters.size(); ++i) {
- const WebKit::WebFilterOperation& op = filters.at(i);
-
- // If the filter is a color matrix, we may be able to combine it with
- // following Filter(s) that also are color matrices.
- SkScalar matrix[20];
- if (GetColorMatrix(op, matrix)) {
- if (have_accumulated_color_matrix) {
- SkScalar newMatrix[20];
- MultColorMatrix(matrix, accumulated_color_matrix, newMatrix);
- memcpy(accumulated_color_matrix,
- newMatrix,
- sizeof(accumulated_color_matrix));
- } else {
- memcpy(accumulated_color_matrix,
- matrix,
- sizeof(accumulated_color_matrix));
- have_accumulated_color_matrix = true;
- }
-
- // We can only combine matrices if clamping of color components
- // would have no effect.
- if (!MatrixNeedsClamping(accumulated_color_matrix))
- continue;
- }
-
- if (have_accumulated_color_matrix) {
- new_list.append(WebKit::WebFilterOperation::createColorMatrixFilter(
- accumulated_color_matrix));
- }
- have_accumulated_color_matrix = false;
-
- switch (op.type()) {
- case WebKit::WebFilterOperation::FilterTypeBlur:
- case WebKit::WebFilterOperation::FilterTypeDropShadow:
- case WebKit::WebFilterOperation::FilterTypeZoom:
- new_list.append(op);
- break;
- case WebKit::WebFilterOperation::FilterTypeBrightness:
- case WebKit::WebFilterOperation::FilterTypeSaturatingBrightness:
- case WebKit::WebFilterOperation::FilterTypeContrast:
- case WebKit::WebFilterOperation::FilterTypeGrayscale:
- case WebKit::WebFilterOperation::FilterTypeSepia:
- case WebKit::WebFilterOperation::FilterTypeSaturate:
- case WebKit::WebFilterOperation::FilterTypeHueRotate:
- case WebKit::WebFilterOperation::FilterTypeInvert:
- case WebKit::WebFilterOperation::FilterTypeOpacity:
- case WebKit::WebFilterOperation::FilterTypeColorMatrix:
- break;
- }
- }
- if (have_accumulated_color_matrix) {
- new_list.append(WebKit::WebFilterOperation::createColorMatrixFilter(
- accumulated_color_matrix));
- }
- return new_list;
-}
-
-SkBitmap RenderSurfaceFilters::Apply(const WebKit::WebFilterOperations& filters,
- unsigned texture_id,
- gfx::SizeF size,
- GrContext* gr_context) {
- DCHECK(gr_context);
-
- WebKit::WebFilterOperations optimized_filters = Optimize(filters);
- FilterBufferState state(gr_context, size, texture_id);
- if (!state.Init(optimized_filters.size()))
- return SkBitmap();
-
- for (unsigned i = 0; i < optimized_filters.size(); ++i) {
- const WebKit::WebFilterOperation& op = optimized_filters.at(i);
- SkCanvas* canvas = state.Canvas();
- switch (op.type()) {
- case WebKit::WebFilterOperation::FilterTypeColorMatrix: {
- SkPaint paint;
- skia::RefPtr<SkColorMatrixFilter> filter =
- skia::AdoptRef(new SkColorMatrixFilter(op.matrix()));
- paint.setColorFilter(filter.get());
- canvas->drawBitmap(state.Source(), 0, 0, &paint);
- break;
- }
- case WebKit::WebFilterOperation::FilterTypeBlur: {
- float std_deviation = op.amount();
- skia::RefPtr<SkImageFilter> filter =
- skia::AdoptRef(new SkBlurImageFilter(std_deviation, std_deviation));
- SkPaint paint;
- paint.setImageFilter(filter.get());
- canvas->drawSprite(state.Source(), 0, 0, &paint);
- break;
- }
- case WebKit::WebFilterOperation::FilterTypeDropShadow: {
- skia::RefPtr<SkImageFilter> blur_filter =
- skia::AdoptRef(new SkBlurImageFilter(op.amount(), op.amount()));
- skia::RefPtr<SkColorFilter> color_filter =
- skia::AdoptRef(SkColorFilter::CreateModeFilter(
- op.dropShadowColor(), SkXfermode::kSrcIn_Mode));
- SkPaint paint;
- paint.setImageFilter(blur_filter.get());
- paint.setColorFilter(color_filter.get());
- paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
- canvas->saveLayer(NULL, &paint);
- canvas->drawBitmap(state.Source(),
- op.dropShadowOffset().x,
- -op.dropShadowOffset().y);
- canvas->restore();
- canvas->drawBitmap(state.Source(), 0, 0);
- break;
- }
- case WebKit::WebFilterOperation::FilterTypeZoom: {
- SkPaint paint;
- int width = state.Source().width();
- int height = state.Source().height();
- skia::RefPtr<SkImageFilter> zoom_filter = skia::AdoptRef(
- new SkMagnifierImageFilter(
- SkRect::MakeXYWH(
- (width - (width / op.amount())) / 2.f,
- (height - (height / op.amount())) / 2.f,
- width / op.amount(),
- height / op.amount()),
- op.zoomInset()));
- paint.setImageFilter(zoom_filter.get());
- canvas->saveLayer(NULL, &paint);
- canvas->drawBitmap(state.Source(), 0, 0);
- canvas->restore();
- break;
- }
- case WebKit::WebFilterOperation::FilterTypeBrightness:
- case WebKit::WebFilterOperation::FilterTypeSaturatingBrightness:
- case WebKit::WebFilterOperation::FilterTypeContrast:
- case WebKit::WebFilterOperation::FilterTypeGrayscale:
- case WebKit::WebFilterOperation::FilterTypeSepia:
- case WebKit::WebFilterOperation::FilterTypeSaturate:
- case WebKit::WebFilterOperation::FilterTypeHueRotate:
- case WebKit::WebFilterOperation::FilterTypeInvert:
- case WebKit::WebFilterOperation::FilterTypeOpacity:
- NOTREACHED();
- break;
- }
- state.Swap();
- }
- return state.Source();
-}
-
-} // namespace cc
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