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Unified Diff: content/browser/compositor/gl_helper_unittest.cc

Issue 1904773004: Revert of Introduce components/display_compositor (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 8 months ago
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Index: content/browser/compositor/gl_helper_unittest.cc
diff --git a/content/browser/compositor/gl_helper_unittest.cc b/content/browser/compositor/gl_helper_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..627e4964c2ff655800266c247b8cbb2c10188a9c
--- /dev/null
+++ b/content/browser/compositor/gl_helper_unittest.cc
@@ -0,0 +1,1439 @@
+// Copyright 2014 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 <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <cmath>
+#include <string>
+#include <vector>
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
+
+#include "base/at_exit.h"
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/files/file_util.h"
+#include "base/json/json_reader.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/strings/stringprintf.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_suite.h"
+#include "base/time/time.h"
+#include "base/trace_event/trace_event.h"
+#include "content/browser/compositor/gl_helper.h"
+#include "content/browser/compositor/gl_helper_readback_support.h"
+#include "content/browser/compositor/gl_helper_scaling.h"
+#include "gpu/command_buffer/client/gl_in_process_context.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkTypes.h"
+#include "ui/gl/gl_implementation.h"
+
+namespace content {
+
+content::GLHelper::ScalerQuality kQualities[] = {
+ content::GLHelper::SCALER_QUALITY_BEST,
+ content::GLHelper::SCALER_QUALITY_GOOD,
+ content::GLHelper::SCALER_QUALITY_FAST,
+};
+
+const char* kQualityNames[] = {
+ "best", "good", "fast",
+};
+
+class GLHelperTest : public testing::Test {
+ protected:
+ void SetUp() override {
+ gpu::gles2::ContextCreationAttribHelper attributes;
+ attributes.alpha_size = 8;
+ attributes.depth_size = 24;
+ attributes.red_size = 8;
+ attributes.green_size = 8;
+ attributes.blue_size = 8;
+ attributes.stencil_size = 8;
+ attributes.samples = 4;
+ attributes.sample_buffers = 1;
+ attributes.bind_generates_resource = false;
+
+ context_.reset(gpu::GLInProcessContext::Create(
+ nullptr, /* service */
+ nullptr, /* surface */
+ true, /* offscreen */
+ gfx::kNullAcceleratedWidget, /* window */
+ gfx::Size(1, 1), /* size */
+ nullptr, /* share_context */
+ attributes, gfx::PreferDiscreteGpu,
+ ::gpu::GLInProcessContextSharedMemoryLimits(),
+ nullptr, /* gpu_memory_buffer_manager */
+ nullptr /* image_factory */));
+ gl_ = context_->GetImplementation();
+ gpu::ContextSupport* support = context_->GetImplementation();
+
+ helper_.reset(new content::GLHelper(gl_, support));
+ helper_scaling_.reset(new content::GLHelperScaling(gl_, helper_.get()));
+ }
+
+ void TearDown() override {
+ helper_scaling_.reset(nullptr);
+ helper_.reset(nullptr);
+ context_.reset(nullptr);
+ }
+
+ // Bicubic filter kernel function.
+ static float Bicubic(float x) {
+ const float a = -0.5;
+ x = std::abs(x);
+ float x2 = x * x;
+ float x3 = x2 * x;
+ if (x <= 1) {
+ return (a + 2) * x3 - (a + 3) * x2 + 1;
+ } else if (x < 2) {
+ return a * x3 - 5 * a * x2 + 8 * a * x - 4 * a;
+ } else {
+ return 0.0f;
+ }
+ }
+
+ // Look up a single channel value. Works for 4-channel and single channel
+ // bitmaps. Clamp x/y.
+ int Channel(SkBitmap* pixels, int x, int y, int c) {
+ if (pixels->bytesPerPixel() == 4) {
+ uint32_t* data =
+ pixels->getAddr32(std::max(0, std::min(x, pixels->width() - 1)),
+ std::max(0, std::min(y, pixels->height() - 1)));
+ return (*data) >> (c * 8) & 0xff;
+ } else {
+ DCHECK_EQ(pixels->bytesPerPixel(), 1);
+ DCHECK_EQ(c, 0);
+ return *pixels->getAddr8(std::max(0, std::min(x, pixels->width() - 1)),
+ std::max(0, std::min(y, pixels->height() - 1)));
+ }
+ }
+
+ // Set a single channel value. Works for 4-channel and single channel
+ // bitmaps. Clamp x/y.
+ void SetChannel(SkBitmap* pixels, int x, int y, int c, int v) {
+ DCHECK_GE(x, 0);
+ DCHECK_GE(y, 0);
+ DCHECK_LT(x, pixels->width());
+ DCHECK_LT(y, pixels->height());
+ if (pixels->bytesPerPixel() == 4) {
+ uint32_t* data = pixels->getAddr32(x, y);
+ v = std::max(0, std::min(v, 255));
+ *data = (*data & ~(0xffu << (c * 8))) | (v << (c * 8));
+ } else {
+ DCHECK_EQ(pixels->bytesPerPixel(), 1);
+ DCHECK_EQ(c, 0);
+ uint8_t* data = pixels->getAddr8(x, y);
+ v = std::max(0, std::min(v, 255));
+ *data = v;
+ }
+ }
+
+ // Print all the R, G, B or A values from an SkBitmap in a
+ // human-readable format.
+ void PrintChannel(SkBitmap* pixels, int c) {
+ for (int y = 0; y < pixels->height(); y++) {
+ std::string formatted;
+ for (int x = 0; x < pixels->width(); x++) {
+ formatted.append(base::StringPrintf("%3d, ", Channel(pixels, x, y, c)));
+ }
+ LOG(ERROR) << formatted;
+ }
+ }
+
+ // Print out the individual steps of a scaler pipeline.
+ std::string PrintStages(
+ const std::vector<GLHelperScaling::ScalerStage>& scaler_stages) {
+ std::string ret;
+ for (size_t i = 0; i < scaler_stages.size(); i++) {
+ ret.append(base::StringPrintf(
+ "%dx%d -> %dx%d ", scaler_stages[i].src_size.width(),
+ scaler_stages[i].src_size.height(), scaler_stages[i].dst_size.width(),
+ scaler_stages[i].dst_size.height()));
+ bool xy_matters = false;
+ switch (scaler_stages[i].shader) {
+ case GLHelperScaling::SHADER_BILINEAR:
+ ret.append("bilinear");
+ break;
+ case GLHelperScaling::SHADER_BILINEAR2:
+ ret.append("bilinear2");
+ xy_matters = true;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR3:
+ ret.append("bilinear3");
+ xy_matters = true;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR4:
+ ret.append("bilinear4");
+ xy_matters = true;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR2X2:
+ ret.append("bilinear2x2");
+ break;
+ case GLHelperScaling::SHADER_BICUBIC_UPSCALE:
+ ret.append("bicubic upscale");
+ xy_matters = true;
+ break;
+ case GLHelperScaling::SHADER_BICUBIC_HALF_1D:
+ ret.append("bicubic 1/2");
+ xy_matters = true;
+ break;
+ case GLHelperScaling::SHADER_PLANAR:
+ ret.append("planar");
+ break;
+ case GLHelperScaling::SHADER_YUV_MRT_PASS1:
+ ret.append("rgb2yuv pass 1");
+ break;
+ case GLHelperScaling::SHADER_YUV_MRT_PASS2:
+ ret.append("rgb2yuv pass 2");
+ break;
+ }
+
+ if (xy_matters) {
+ if (scaler_stages[i].scale_x) {
+ ret.append(" X");
+ } else {
+ ret.append(" Y");
+ }
+ }
+ ret.append("\n");
+ }
+ return ret;
+ }
+
+ bool CheckScale(double scale, int samples, bool already_scaled) {
+ // 1:1 is valid if there is one sample.
+ if (samples == 1 && scale == 1.0) {
+ return true;
+ }
+ // Is it an exact down-scale (50%, 25%, etc.?)
+ if (scale == 2.0 * samples) {
+ return true;
+ }
+ // Upscales, only valid if we haven't already scaled in this dimension.
+ if (!already_scaled) {
+ // Is it a valid bilinear upscale?
+ if (samples == 1 && scale <= 1.0) {
+ return true;
+ }
+ // Multi-sample upscale-downscale combination?
+ if (scale > samples / 2.0 && scale < samples) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // Make sure that the stages of the scaler pipeline are sane.
+ void ValidateScalerStages(
+ content::GLHelper::ScalerQuality quality,
+ const std::vector<GLHelperScaling::ScalerStage>& scaler_stages,
+ const gfx::Size& dst_size,
+ const std::string& message) {
+ bool previous_error = HasFailure();
+ // First, check that the input size for each stage is equal to
+ // the output size of the previous stage.
+ for (size_t i = 1; i < scaler_stages.size(); i++) {
+ EXPECT_EQ(scaler_stages[i - 1].dst_size.width(),
+ scaler_stages[i].src_size.width());
+ EXPECT_EQ(scaler_stages[i - 1].dst_size.height(),
+ scaler_stages[i].src_size.height());
+ EXPECT_EQ(scaler_stages[i].src_subrect.x(), 0);
+ EXPECT_EQ(scaler_stages[i].src_subrect.y(), 0);
+ EXPECT_EQ(scaler_stages[i].src_subrect.width(),
+ scaler_stages[i].src_size.width());
+ EXPECT_EQ(scaler_stages[i].src_subrect.height(),
+ scaler_stages[i].src_size.height());
+ }
+
+ // Check the output size matches the destination of the last stage
+ EXPECT_EQ(scaler_stages[scaler_stages.size() - 1].dst_size.width(),
+ dst_size.width());
+ EXPECT_EQ(scaler_stages[scaler_stages.size() - 1].dst_size.height(),
+ dst_size.height());
+
+ // Used to verify that up-scales are not attempted after some
+ // other scale.
+ bool scaled_x = false;
+ bool scaled_y = false;
+
+ for (size_t i = 0; i < scaler_stages.size(); i++) {
+ // Note: 2.0 means scaling down by 50%
+ double x_scale =
+ static_cast<double>(scaler_stages[i].src_subrect.width()) /
+ static_cast<double>(scaler_stages[i].dst_size.width());
+ double y_scale =
+ static_cast<double>(scaler_stages[i].src_subrect.height()) /
+ static_cast<double>(scaler_stages[i].dst_size.height());
+
+ int x_samples = 0;
+ int y_samples = 0;
+
+ // Codify valid scale operations.
+ switch (scaler_stages[i].shader) {
+ case GLHelperScaling::SHADER_PLANAR:
+ case GLHelperScaling::SHADER_YUV_MRT_PASS1:
+ case GLHelperScaling::SHADER_YUV_MRT_PASS2:
+ EXPECT_TRUE(false) << "Invalid shader.";
+ break;
+
+ case GLHelperScaling::SHADER_BILINEAR:
+ if (quality != content::GLHelper::SCALER_QUALITY_FAST) {
+ x_samples = 1;
+ y_samples = 1;
+ }
+ break;
+ case GLHelperScaling::SHADER_BILINEAR2:
+ x_samples = 2;
+ y_samples = 1;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR3:
+ x_samples = 3;
+ y_samples = 1;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR4:
+ x_samples = 4;
+ y_samples = 1;
+ break;
+ case GLHelperScaling::SHADER_BILINEAR2X2:
+ x_samples = 2;
+ y_samples = 2;
+ break;
+ case GLHelperScaling::SHADER_BICUBIC_UPSCALE:
+ if (scaler_stages[i].scale_x) {
+ EXPECT_LT(x_scale, 1.0);
+ EXPECT_EQ(y_scale, 1.0);
+ } else {
+ EXPECT_EQ(x_scale, 1.0);
+ EXPECT_LT(y_scale, 1.0);
+ }
+ break;
+ case GLHelperScaling::SHADER_BICUBIC_HALF_1D:
+ if (scaler_stages[i].scale_x) {
+ EXPECT_EQ(x_scale, 2.0);
+ EXPECT_EQ(y_scale, 1.0);
+ } else {
+ EXPECT_EQ(x_scale, 1.0);
+ EXPECT_EQ(y_scale, 2.0);
+ }
+ break;
+ }
+
+ if (!scaler_stages[i].scale_x) {
+ std::swap(x_samples, y_samples);
+ }
+
+ if (x_samples) {
+ EXPECT_TRUE(CheckScale(x_scale, x_samples, scaled_x)) << "x_scale = "
+ << x_scale;
+ }
+ if (y_samples) {
+ EXPECT_TRUE(CheckScale(y_scale, y_samples, scaled_y)) << "y_scale = "
+ << y_scale;
+ }
+
+ if (x_scale != 1.0) {
+ scaled_x = true;
+ }
+ if (y_scale != 1.0) {
+ scaled_y = true;
+ }
+ }
+
+ if (HasFailure() && !previous_error) {
+ LOG(ERROR) << "Invalid scaler stages: " << message;
+ LOG(ERROR) << "Scaler stages:";
+ LOG(ERROR) << PrintStages(scaler_stages);
+ }
+ }
+
+ // Compares two bitmaps taking color types into account. Checks whether each
+ // component of each pixel is no more than |maxdiff| apart. If bitmaps are not
+ // similar enough, prints out |truth|, |other|, |source|, |scaler_stages|
+ // and |message|.
+ void Compare(SkBitmap* truth,
+ SkBitmap* other,
+ int maxdiff,
+ SkBitmap* source,
+ const std::vector<GLHelperScaling::ScalerStage>& scaler_stages,
+ std::string message) {
+ EXPECT_EQ(truth->width(), other->width());
+ EXPECT_EQ(truth->height(), other->height());
+ bool swizzle = (truth->colorType() == kRGBA_8888_SkColorType &&
+ other->colorType() == kBGRA_8888_SkColorType) ||
+ (truth->colorType() == kBGRA_8888_SkColorType &&
+ other->colorType() == kRGBA_8888_SkColorType);
+ EXPECT_TRUE(swizzle || truth->colorType() == other->colorType());
+ int bpp = truth->bytesPerPixel();
+ for (int x = 0; x < truth->width(); x++) {
+ for (int y = 0; y < truth->height(); y++) {
+ for (int c = 0; c < bpp; c++) {
+ int a = Channel(truth, x, y, c);
+ // swizzle when comparing if needed
+ int b = swizzle && (c == 0 || c == 2)
+ ? Channel(other, x, y, (c + 2) & 2)
+ : Channel(other, x, y, c);
+ EXPECT_NEAR(a, b, maxdiff) << " x=" << x << " y=" << y << " c=" << c
+ << " " << message;
+ if (std::abs(a - b) > maxdiff) {
+ LOG(ERROR) << "-------expected--------";
+ for (int i = 0; i < bpp; i++) {
+ LOG(ERROR) << "Channel " << i << ":";
+ PrintChannel(truth, i);
+ }
+ LOG(ERROR) << "-------actual--------";
+ for (int i = 0; i < bpp; i++) {
+ LOG(ERROR) << "Channel " << i << ":";
+ PrintChannel(other, i);
+ }
+ if (source) {
+ LOG(ERROR) << "-------original--------";
+ for (int i = 0; i < source->bytesPerPixel(); i++) {
+ LOG(ERROR) << "Channel " << i << ":";
+ PrintChannel(source, i);
+ }
+ }
+ LOG(ERROR) << "-----Scaler stages------";
+ LOG(ERROR) << PrintStages(scaler_stages);
+ return;
+ }
+ }
+ }
+ }
+ }
+
+ // Get a single R, G, B or A value as a float.
+ float ChannelAsFloat(SkBitmap* pixels, int x, int y, int c) {
+ return Channel(pixels, x, y, c) / 255.0;
+ }
+
+ // Works like a GL_LINEAR lookup on an SkBitmap.
+ float Bilinear(SkBitmap* pixels, float x, float y, int c) {
+ x -= 0.5;
+ y -= 0.5;
+ int base_x = static_cast<int>(floorf(x));
+ int base_y = static_cast<int>(floorf(y));
+ x -= base_x;
+ y -= base_y;
+ return (ChannelAsFloat(pixels, base_x, base_y, c) * (1 - x) * (1 - y) +
+ ChannelAsFloat(pixels, base_x + 1, base_y, c) * x * (1 - y) +
+ ChannelAsFloat(pixels, base_x, base_y + 1, c) * (1 - x) * y +
+ ChannelAsFloat(pixels, base_x + 1, base_y + 1, c) * x * y);
+ }
+
+ // Encodes an RGBA bitmap to grayscale.
+ // Reference implementation for
+ // GLHelper::CopyToTextureImpl::EncodeTextureAsGrayscale.
+ void EncodeToGrayscaleSlow(SkBitmap* input, SkBitmap* output) {
+ const float kRGBtoGrayscaleColorWeights[3] = {0.213f, 0.715f, 0.072f};
+ CHECK_EQ(kAlpha_8_SkColorType, output->colorType());
+ CHECK_EQ(input->width(), output->width());
+ CHECK_EQ(input->height(), output->height());
+ CHECK_EQ(input->colorType(), kRGBA_8888_SkColorType);
+
+ for (int dst_y = 0; dst_y < output->height(); dst_y++) {
+ for (int dst_x = 0; dst_x < output->width(); dst_x++) {
+ float c0 = ChannelAsFloat(input, dst_x, dst_y, 0);
+ float c1 = ChannelAsFloat(input, dst_x, dst_y, 1);
+ float c2 = ChannelAsFloat(input, dst_x, dst_y, 2);
+ float value = c0 * kRGBtoGrayscaleColorWeights[0] +
+ c1 * kRGBtoGrayscaleColorWeights[1] +
+ c2 * kRGBtoGrayscaleColorWeights[2];
+ SetChannel(output, dst_x, dst_y, 0,
+ static_cast<int>(value * 255.0f + 0.5f));
+ }
+ }
+ }
+
+ // Very slow bicubic / bilinear scaler for reference.
+ void ScaleSlow(SkBitmap* input,
+ SkBitmap* output,
+ content::GLHelper::ScalerQuality quality) {
+ float xscale = static_cast<float>(input->width()) / output->width();
+ float yscale = static_cast<float>(input->height()) / output->height();
+ float clamped_xscale = xscale < 1.0 ? 1.0 : 1.0 / xscale;
+ float clamped_yscale = yscale < 1.0 ? 1.0 : 1.0 / yscale;
+ for (int dst_y = 0; dst_y < output->height(); dst_y++) {
+ for (int dst_x = 0; dst_x < output->width(); dst_x++) {
+ for (int channel = 0; channel < 4; channel++) {
+ float dst_x_in_src = (dst_x + 0.5f) * xscale;
+ float dst_y_in_src = (dst_y + 0.5f) * yscale;
+
+ float value = 0.0f;
+ float sum = 0.0f;
+ switch (quality) {
+ case content::GLHelper::SCALER_QUALITY_BEST:
+ for (int src_y = -10; src_y < input->height() + 10; ++src_y) {
+ float coeff_y =
+ Bicubic((src_y + 0.5f - dst_y_in_src) * clamped_yscale);
+ if (coeff_y == 0.0f) {
+ continue;
+ }
+ for (int src_x = -10; src_x < input->width() + 10; ++src_x) {
+ float coeff =
+ coeff_y *
+ Bicubic((src_x + 0.5f - dst_x_in_src) * clamped_xscale);
+ if (coeff == 0.0f) {
+ continue;
+ }
+ sum += coeff;
+ float c = ChannelAsFloat(input, src_x, src_y, channel);
+ value += c * coeff;
+ }
+ }
+ break;
+
+ case content::GLHelper::SCALER_QUALITY_GOOD: {
+ int xshift = 0, yshift = 0;
+ while ((output->width() << xshift) < input->width()) {
+ xshift++;
+ }
+ while ((output->height() << yshift) < input->height()) {
+ yshift++;
+ }
+ int xmag = 1 << xshift;
+ int ymag = 1 << yshift;
+ if (xmag == 4 && output->width() * 3 >= input->width()) {
+ xmag = 3;
+ }
+ if (ymag == 4 && output->height() * 3 >= input->height()) {
+ ymag = 3;
+ }
+ for (int x = 0; x < xmag; x++) {
+ for (int y = 0; y < ymag; y++) {
+ value += Bilinear(
+ input, (dst_x * xmag + x + 0.5) * xscale / xmag,
+ (dst_y * ymag + y + 0.5) * yscale / ymag, channel);
+ sum += 1.0;
+ }
+ }
+ break;
+ }
+
+ case content::GLHelper::SCALER_QUALITY_FAST:
+ value = Bilinear(input, dst_x_in_src, dst_y_in_src, channel);
+ sum = 1.0;
+ }
+ value /= sum;
+ SetChannel(output, dst_x, dst_y, channel,
+ static_cast<int>(value * 255.0f + 0.5f));
+ }
+ }
+ }
+ }
+
+ void FlipSKBitmap(SkBitmap* bitmap) {
+ int bpp = bitmap->bytesPerPixel();
+ DCHECK(bpp == 4 || bpp == 1);
+ int top_line = 0;
+ int bottom_line = bitmap->height() - 1;
+ while (top_line < bottom_line) {
+ for (int x = 0; x < bitmap->width(); x++) {
+ bpp == 4 ? std::swap(*bitmap->getAddr32(x, top_line),
+ *bitmap->getAddr32(x, bottom_line))
+ : std::swap(*bitmap->getAddr8(x, top_line),
+ *bitmap->getAddr8(x, bottom_line));
+ }
+ top_line++;
+ bottom_line--;
+ }
+ }
+
+ // Swaps red and blue channels in each pixel in a 32-bit bitmap.
+ void SwizzleSKBitmap(SkBitmap* bitmap) {
+ int bpp = bitmap->bytesPerPixel();
+ DCHECK(bpp == 4);
+ for (int y = 0; y < bitmap->height(); y++) {
+ for (int x = 0; x < bitmap->width(); x++) {
+ // Swap channels 0 and 2 (red and blue)
+ int c0 = Channel(bitmap, x, y, 0);
+ int c2 = Channel(bitmap, x, y, 2);
+ SetChannel(bitmap, x, y, 2, c0);
+ SetChannel(bitmap, x, y, 0, c2);
+ }
+ }
+ }
+
+ // gl_helper scales recursively, so we'll need to do that
+ // in the reference implementation too.
+ void ScaleSlowRecursive(SkBitmap* input,
+ SkBitmap* output,
+ content::GLHelper::ScalerQuality quality) {
+ if (quality == content::GLHelper::SCALER_QUALITY_FAST ||
+ quality == content::GLHelper::SCALER_QUALITY_GOOD) {
+ ScaleSlow(input, output, quality);
+ return;
+ }
+
+ float xscale = static_cast<float>(output->width()) / input->width();
+
+ // This corresponds to all the operations we can do directly.
+ float yscale = static_cast<float>(output->height()) / input->height();
+ if ((xscale == 1.0f && yscale == 1.0f) ||
+ (xscale == 0.5f && yscale == 1.0f) ||
+ (xscale == 1.0f && yscale == 0.5f) ||
+ (xscale >= 1.0f && yscale == 1.0f) ||
+ (xscale == 1.0f && yscale >= 1.0f)) {
+ ScaleSlow(input, output, quality);
+ return;
+ }
+
+ // Now we break the problem down into smaller pieces, using the
+ // operations available.
+ int xtmp = input->width();
+ int ytmp = input->height();
+
+ if (output->height() != input->height()) {
+ ytmp = output->height();
+ while (ytmp < input->height() && ytmp * 2 != input->height()) {
+ ytmp += ytmp;
+ }
+ } else {
+ xtmp = output->width();
+ while (xtmp < input->width() && xtmp * 2 != input->width()) {
+ xtmp += xtmp;
+ }
+ }
+
+ SkBitmap tmp;
+ tmp.allocN32Pixels(xtmp, ytmp);
+
+ ScaleSlowRecursive(input, &tmp, quality);
+ ScaleSlowRecursive(&tmp, output, quality);
+ }
+
+ // Creates an RGBA SkBitmap
+ std::unique_ptr<SkBitmap> CreateTestBitmap(int width,
+ int height,
+ int test_pattern) {
+ std::unique_ptr<SkBitmap> bitmap(new SkBitmap);
+ bitmap->allocPixels(SkImageInfo::Make(width, height, kRGBA_8888_SkColorType,
+ kPremul_SkAlphaType));
+
+ for (int x = 0; x < width; ++x) {
+ for (int y = 0; y < height; ++y) {
+ switch (test_pattern) {
+ case 0: // Smooth test pattern
+ SetChannel(bitmap.get(), x, y, 0, x * 10);
+ SetChannel(bitmap.get(), x, y, 0, y == 0 ? x * 50 : x * 10);
+ SetChannel(bitmap.get(), x, y, 1, y * 10);
+ SetChannel(bitmap.get(), x, y, 2, (x + y) * 10);
+ SetChannel(bitmap.get(), x, y, 3, 255);
+ break;
+ case 1: // Small blocks
+ SetChannel(bitmap.get(), x, y, 0, x & 1 ? 255 : 0);
+ SetChannel(bitmap.get(), x, y, 1, y & 1 ? 255 : 0);
+ SetChannel(bitmap.get(), x, y, 2, (x + y) & 1 ? 255 : 0);
+ SetChannel(bitmap.get(), x, y, 3, 255);
+ break;
+ case 2: // Medium blocks
+ SetChannel(bitmap.get(), x, y, 0, 10 + x / 2 * 50);
+ SetChannel(bitmap.get(), x, y, 1, 10 + y / 3 * 50);
+ SetChannel(bitmap.get(), x, y, 2, (x + y) / 5 * 50 + 5);
+ SetChannel(bitmap.get(), x, y, 3, 255);
+ break;
+ }
+ }
+ }
+ return bitmap;
+ }
+
+ // Binds texture and framebuffer and loads the bitmap pixels into the texture.
+ void BindTextureAndFrameBuffer(GLuint texture,
+ GLuint framebuffer,
+ SkBitmap* bitmap,
+ int width,
+ int height) {
+ gl_->BindFramebuffer(GL_FRAMEBUFFER, framebuffer);
+ gl_->BindTexture(GL_TEXTURE_2D, texture);
+ gl_->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
+ GL_UNSIGNED_BYTE, bitmap->getPixels());
+ }
+
+ // Create a test image, transform it using
+ // GLHelper::CropScaleReadbackAndCleanTexture and a reference implementation
+ // and compare the results.
+ void TestCropScaleReadbackAndCleanTexture(int xsize,
+ int ysize,
+ int scaled_xsize,
+ int scaled_ysize,
+ int test_pattern,
+ SkColorType out_color_type,
+ bool swizzle,
+ size_t quality_index) {
+ DCHECK(out_color_type == kAlpha_8_SkColorType ||
+ out_color_type == kRGBA_8888_SkColorType ||
+ out_color_type == kBGRA_8888_SkColorType);
+ GLuint src_texture;
+ gl_->GenTextures(1, &src_texture);
+ GLuint framebuffer;
+ gl_->GenFramebuffers(1, &framebuffer);
+ std::unique_ptr<SkBitmap> input_pixels =
+ CreateTestBitmap(xsize, ysize, test_pattern);
+ BindTextureAndFrameBuffer(src_texture, framebuffer, input_pixels.get(),
+ xsize, ysize);
+
+ std::string message = base::StringPrintf(
+ "input size: %dx%d "
+ "output size: %dx%d "
+ "pattern: %d , quality: %s, "
+ "out_color_type: %d",
+ xsize, ysize, scaled_xsize, scaled_ysize, test_pattern,
+ kQualityNames[quality_index], out_color_type);
+
+ // Transform the bitmap using GLHelper::CropScaleReadbackAndCleanTexture.
+ SkBitmap output_pixels;
+ output_pixels.allocPixels(SkImageInfo::Make(
+ scaled_xsize, scaled_ysize, out_color_type, kPremul_SkAlphaType));
+ base::RunLoop run_loop;
+ gfx::Size encoded_texture_size;
+ helper_->CropScaleReadbackAndCleanTexture(
+ src_texture, gfx::Size(xsize, ysize), gfx::Rect(xsize, ysize),
+ gfx::Size(scaled_xsize, scaled_ysize),
+ static_cast<unsigned char*>(output_pixels.getPixels()), out_color_type,
+ base::Bind(&callcallback, run_loop.QuitClosure()),
+ kQualities[quality_index]);
+ run_loop.Run();
+ // CropScaleReadbackAndCleanTexture flips the pixels. Flip them back.
+ FlipSKBitmap(&output_pixels);
+
+ // If the bitmap shouldn't have changed - compare against input.
+ if (xsize == scaled_xsize && ysize == scaled_ysize &&
+ out_color_type != kAlpha_8_SkColorType) {
+ const std::vector<GLHelperScaling::ScalerStage> dummy_stages;
+ Compare(input_pixels.get(), &output_pixels, 0, nullptr, dummy_stages,
+ message + " comparing against input");
+ return;
+ }
+
+ // Now transform the bitmap using the reference implementation.
+ SkBitmap scaled_pixels;
+ scaled_pixels.allocPixels(SkImageInfo::Make(scaled_xsize, scaled_ysize,
+ kRGBA_8888_SkColorType,
+ kPremul_SkAlphaType));
+ SkBitmap truth_pixels;
+ // Step 1: Scale
+ ScaleSlowRecursive(input_pixels.get(), &scaled_pixels,
+ kQualities[quality_index]);
+ // Step 2: Encode to grayscale if needed.
+ if (out_color_type == kAlpha_8_SkColorType) {
+ truth_pixels.allocPixels(SkImageInfo::Make(
+ scaled_xsize, scaled_ysize, out_color_type, kPremul_SkAlphaType));
+ EncodeToGrayscaleSlow(&scaled_pixels, &truth_pixels);
+ } else {
+ truth_pixels = scaled_pixels;
+ }
+
+ // Now compare the results.
+ SkAutoLockPixels lock_input(truth_pixels);
+ const std::vector<GLHelperScaling::ScalerStage> dummy_stages;
+ Compare(&truth_pixels, &output_pixels, 2, input_pixels.get(), dummy_stages,
+ message + " comparing against transformed/scaled");
+
+ gl_->DeleteTextures(1, &src_texture);
+ gl_->DeleteFramebuffers(1, &framebuffer);
+ }
+
+ // Scaling test: Create a test image, scale it using GLHelperScaling
+ // and a reference implementation and compare the results.
+ void TestScale(int xsize,
+ int ysize,
+ int scaled_xsize,
+ int scaled_ysize,
+ int test_pattern,
+ size_t quality_index,
+ bool flip) {
+ GLuint src_texture;
+ gl_->GenTextures(1, &src_texture);
+ GLuint framebuffer;
+ gl_->GenFramebuffers(1, &framebuffer);
+ std::unique_ptr<SkBitmap> input_pixels =
+ CreateTestBitmap(xsize, ysize, test_pattern);
+ BindTextureAndFrameBuffer(src_texture, framebuffer, input_pixels.get(),
+ xsize, ysize);
+
+ std::string message = base::StringPrintf(
+ "input size: %dx%d "
+ "output size: %dx%d "
+ "pattern: %d quality: %s",
+ xsize, ysize, scaled_xsize, scaled_ysize, test_pattern,
+ kQualityNames[quality_index]);
+
+ std::vector<GLHelperScaling::ScalerStage> stages;
+ helper_scaling_->ComputeScalerStages(kQualities[quality_index],
+ gfx::Size(xsize, ysize),
+ gfx::Rect(0, 0, xsize, ysize),
+ gfx::Size(scaled_xsize, scaled_ysize),
+ flip,
+ false,
+ &stages);
+ ValidateScalerStages(kQualities[quality_index],
+ stages,
+ gfx::Size(scaled_xsize, scaled_ysize),
+ message);
+
+ GLuint dst_texture = helper_->CopyAndScaleTexture(
+ src_texture, gfx::Size(xsize, ysize),
+ gfx::Size(scaled_xsize, scaled_ysize), flip, kQualities[quality_index]);
+
+ SkBitmap output_pixels;
+ output_pixels.allocPixels(SkImageInfo::Make(scaled_xsize, scaled_ysize,
+ kRGBA_8888_SkColorType,
+ kPremul_SkAlphaType));
+
+ helper_->ReadbackTextureSync(
+ dst_texture, gfx::Rect(0, 0, scaled_xsize, scaled_ysize),
+ static_cast<unsigned char*>(output_pixels.getPixels()),
+ kRGBA_8888_SkColorType);
+ if (flip) {
+ // Flip the pixels back.
+ FlipSKBitmap(&output_pixels);
+ }
+
+ // If the bitmap shouldn't have changed - compare against input.
+ if (xsize == scaled_xsize && ysize == scaled_ysize) {
+ Compare(input_pixels.get(), &output_pixels, 0, nullptr, stages,
+ message + " comparing against input");
+ return;
+ }
+
+ // Now scale the bitmap using the reference implementation.
+ SkBitmap truth_pixels;
+ truth_pixels.allocPixels(SkImageInfo::Make(scaled_xsize, scaled_ysize,
+ kRGBA_8888_SkColorType,
+ kPremul_SkAlphaType));
+ ScaleSlowRecursive(input_pixels.get(), &truth_pixels,
+ kQualities[quality_index]);
+ Compare(&truth_pixels, &output_pixels, 2, input_pixels.get(), stages,
+ message + " comparing against scaled");
+
+ gl_->DeleteTextures(1, &src_texture);
+ gl_->DeleteTextures(1, &dst_texture);
+ gl_->DeleteFramebuffers(1, &framebuffer);
+ }
+
+ // Create a scaling pipeline and check that it is made up of
+ // valid scaling operations.
+ void TestScalerPipeline(size_t quality,
+ int xsize,
+ int ysize,
+ int dst_xsize,
+ int dst_ysize) {
+ std::vector<GLHelperScaling::ScalerStage> stages;
+ helper_scaling_->ComputeScalerStages(
+ kQualities[quality], gfx::Size(xsize, ysize),
+ gfx::Rect(0, 0, xsize, ysize), gfx::Size(dst_xsize, dst_ysize), false,
+ false, &stages);
+ ValidateScalerStages(kQualities[quality], stages,
+ gfx::Size(dst_xsize, dst_ysize),
+ base::StringPrintf("input size: %dx%d "
+ "output size: %dx%d "
+ "quality: %s",
+ xsize, ysize, dst_xsize, dst_ysize,
+ kQualityNames[quality]));
+ }
+
+ // Create a scaling pipeline and make sure that the steps
+ // are exactly the steps we expect.
+ void CheckPipeline(content::GLHelper::ScalerQuality quality,
+ int xsize,
+ int ysize,
+ int dst_xsize,
+ int dst_ysize,
+ const std::string& description) {
+ std::vector<GLHelperScaling::ScalerStage> stages;
+ helper_scaling_->ComputeScalerStages(
+ quality, gfx::Size(xsize, ysize), gfx::Rect(0, 0, xsize, ysize),
+ gfx::Size(dst_xsize, dst_ysize), false, false, &stages);
+ ValidateScalerStages(content::GLHelper::SCALER_QUALITY_GOOD, stages,
+ gfx::Size(dst_xsize, dst_ysize), "");
+ EXPECT_EQ(PrintStages(stages), description);
+ }
+
+ static void callcallback(const base::Callback<void()>& callback,
+ bool result) {
+ callback.Run();
+ }
+
+ void DrawGridToBitmap(int w,
+ int h,
+ SkColor background_color,
+ SkColor grid_color,
+ int grid_pitch,
+ int grid_width,
+ SkBitmap& bmp) {
+ ASSERT_GT(grid_pitch, 0);
+ ASSERT_GT(grid_width, 0);
+ ASSERT_NE(background_color, grid_color);
+
+ for (int y = 0; y < h; ++y) {
+ bool y_on_grid = ((y % grid_pitch) < grid_width);
+
+ for (int x = 0; x < w; ++x) {
+ bool on_grid = (y_on_grid || ((x % grid_pitch) < grid_width));
+
+ if (bmp.colorType() == kRGBA_8888_SkColorType ||
+ bmp.colorType() == kBGRA_8888_SkColorType) {
+ *bmp.getAddr32(x, y) = (on_grid ? grid_color : background_color);
+ } else if (bmp.colorType() == kRGB_565_SkColorType) {
+ *bmp.getAddr16(x, y) = (on_grid ? grid_color : background_color);
+ }
+ }
+ }
+ }
+
+ void DrawCheckerToBitmap(int w,
+ int h,
+ SkColor color1,
+ SkColor color2,
+ int rect_w,
+ int rect_h,
+ SkBitmap& bmp) {
+ ASSERT_GT(rect_w, 0);
+ ASSERT_GT(rect_h, 0);
+ ASSERT_NE(color1, color2);
+
+ for (int y = 0; y < h; ++y) {
+ bool y_bit = (((y / rect_h) & 0x1) == 0);
+
+ for (int x = 0; x < w; ++x) {
+ bool x_bit = (((x / rect_w) & 0x1) == 0);
+
+ bool use_color2 = (x_bit != y_bit); // xor
+ if (bmp.colorType() == kRGBA_8888_SkColorType ||
+ bmp.colorType() == kBGRA_8888_SkColorType) {
+ *bmp.getAddr32(x, y) = (use_color2 ? color2 : color1);
+ } else if (bmp.colorType() == kRGB_565_SkColorType) {
+ *bmp.getAddr16(x, y) = (use_color2 ? color2 : color1);
+ }
+ }
+ }
+ }
+
+ bool ColorComponentsClose(SkColor component1,
+ SkColor component2,
+ SkColorType color_type) {
+ int c1 = static_cast<int>(component1);
+ int c2 = static_cast<int>(component2);
+ bool result = false;
+ switch (color_type) {
+ case kRGBA_8888_SkColorType:
+ case kBGRA_8888_SkColorType:
+ result = (std::abs(c1 - c2) == 0);
+ break;
+ case kRGB_565_SkColorType:
+ result = (std::abs(c1 - c2) <= 7);
+ break;
+ default:
+ break;
+ }
+ return result;
+ }
+
+ bool ColorsClose(SkColor color1, SkColor color2, SkColorType color_type) {
+ bool red = ColorComponentsClose(SkColorGetR(color1), SkColorGetR(color2),
+ color_type);
+ bool green = ColorComponentsClose(SkColorGetG(color1), SkColorGetG(color2),
+ color_type);
+ bool blue = ColorComponentsClose(SkColorGetB(color1), SkColorGetB(color2),
+ color_type);
+ bool alpha = ColorComponentsClose(SkColorGetA(color1), SkColorGetA(color2),
+ color_type);
+ if (color_type == kRGB_565_SkColorType) {
+ return red && blue && green;
+ }
+ return red && blue && green && alpha;
+ }
+
+ bool IsEqual(const SkBitmap& bmp1, const SkBitmap& bmp2) {
+ if (bmp1.isNull() && bmp2.isNull())
+ return true;
+ if (bmp1.width() != bmp2.width() || bmp1.height() != bmp2.height()) {
+ LOG(ERROR) << "Bitmap geometry check failure";
+ return false;
+ }
+ if (bmp1.colorType() != bmp2.colorType())
+ return false;
+
+ SkAutoLockPixels lock1(bmp1);
+ SkAutoLockPixels lock2(bmp2);
+ if (!bmp1.getPixels() || !bmp2.getPixels()) {
+ LOG(ERROR) << "Empty Bitmap!";
+ return false;
+ }
+ for (int y = 0; y < bmp1.height(); ++y) {
+ for (int x = 0; x < bmp1.width(); ++x) {
+ if (!ColorsClose(bmp1.getColor(x, y), bmp2.getColor(x, y),
+ bmp1.colorType())) {
+ LOG(ERROR) << "Bitmap color comparision failure";
+ return false;
+ }
+ }
+ }
+ return true;
+ }
+
+ void BindAndAttachTextureWithPixels(GLuint src_texture,
+ SkColorType color_type,
+ const gfx::Size& src_size,
+ const SkBitmap& input_pixels) {
+ gl_->BindTexture(GL_TEXTURE_2D, src_texture);
+ GLenum format = 0;
+ switch (color_type) {
+ case kBGRA_8888_SkColorType:
+ format = GL_BGRA_EXT;
+ break;
+ case kRGBA_8888_SkColorType:
+ format = GL_RGBA;
+ break;
+ case kRGB_565_SkColorType:
+ format = GL_RGB;
+ break;
+ default:
+ NOTREACHED();
+ }
+ GLenum type = (color_type == kRGB_565_SkColorType) ?
+ GL_UNSIGNED_SHORT_5_6_5 : GL_UNSIGNED_BYTE;
+ gl_->TexImage2D(GL_TEXTURE_2D, 0, format, src_size.width(),
+ src_size.height(), 0, format, type,
+ input_pixels.getPixels());
+ }
+
+ void ReadBackTexture(GLuint src_texture,
+ const gfx::Size& src_size,
+ unsigned char* pixels,
+ SkColorType color_type,
+ bool async) {
+ if (async) {
+ base::RunLoop run_loop;
+ helper_->ReadbackTextureAsync(
+ src_texture, src_size, pixels, color_type,
+ base::Bind(&callcallback, run_loop.QuitClosure()));
+ run_loop.Run();
+ } else {
+ helper_->ReadbackTextureSync(src_texture, gfx::Rect(src_size), pixels,
+ color_type);
+ }
+ }
+ // Test basic format readback.
+ bool TestTextureFormatReadback(const gfx::Size& src_size,
+ SkColorType color_type,
+ bool async) {
+ SkImageInfo info = SkImageInfo::Make(src_size.width(), src_size.height(),
+ color_type, kPremul_SkAlphaType);
+ if (!helper_->IsReadbackConfigSupported(color_type)) {
+ LOG(INFO) << "Skipping test format not supported" << color_type;
+ return true;
+ }
+ GLuint src_texture;
+ gl_->GenTextures(1, &src_texture);
+ SkBitmap input_pixels;
+ input_pixels.allocPixels(info);
+ // Test Pattern-1, Fill with Plain color pattern.
+ // Erase the input bitmap with red color.
+ input_pixels.eraseColor(SK_ColorRED);
+ BindAndAttachTextureWithPixels(src_texture, color_type, src_size,
+ input_pixels);
+ SkBitmap output_pixels;
+ output_pixels.allocPixels(info);
+ // Initialize the output bitmap with Green color.
+ // When the readback is over output bitmap should have the red color.
+ output_pixels.eraseColor(SK_ColorGREEN);
+ uint8_t* pixels = static_cast<uint8_t*>(output_pixels.getPixels());
+ ReadBackTexture(src_texture, src_size, pixels, color_type, async);
+ bool result = IsEqual(input_pixels, output_pixels);
+ if (!result) {
+ LOG(ERROR) << "Bitmap comparision failure Pattern-1";
+ return false;
+ }
+ const int rect_w = 10, rect_h = 4, src_grid_pitch = 10, src_grid_width = 4;
+ const SkColor color1 = SK_ColorRED, color2 = SK_ColorBLUE;
+ // Test Pattern-2, Fill with Grid Pattern.
+ DrawGridToBitmap(src_size.width(), src_size.height(), color2, color1,
+ src_grid_pitch, src_grid_width, input_pixels);
+ BindAndAttachTextureWithPixels(src_texture, color_type, src_size,
+ input_pixels);
+ ReadBackTexture(src_texture, src_size, pixels, color_type, async);
+ result = IsEqual(input_pixels, output_pixels);
+ if (!result) {
+ LOG(ERROR) << "Bitmap comparision failure Pattern-2";
+ return false;
+ }
+ // Test Pattern-3, Fill with CheckerBoard Pattern.
+ DrawCheckerToBitmap(src_size.width(), src_size.height(), color1, color2,
+ rect_w, rect_h, input_pixels);
+ BindAndAttachTextureWithPixels(src_texture, color_type, src_size,
+ input_pixels);
+ ReadBackTexture(src_texture, src_size, pixels, color_type, async);
+ result = IsEqual(input_pixels, output_pixels);
+ if (!result) {
+ LOG(ERROR) << "Bitmap comparision failure Pattern-3";
+ return false;
+ }
+ gl_->DeleteTextures(1, &src_texture);
+ if (HasFailure()) {
+ return false;
+ }
+ return true;
+ }
+
+ void TestAddOps(int src, int dst, bool scale_x, bool allow3) {
+ std::deque<GLHelperScaling::ScaleOp> ops;
+ GLHelperScaling::ScaleOp::AddOps(src, dst, scale_x, allow3, &ops);
+ // Scale factor 3 is a special case.
+ // It is currently only allowed by itself.
+ if (allow3 && dst * 3 >= src && dst * 2 < src) {
+ EXPECT_EQ(ops[0].scale_factor, 3);
+ EXPECT_EQ(ops.size(), 1U);
+ EXPECT_EQ(ops[0].scale_x, scale_x);
+ EXPECT_EQ(ops[0].scale_size, dst);
+ return;
+ }
+
+ for (size_t i = 0; i < ops.size(); i++) {
+ EXPECT_EQ(ops[i].scale_x, scale_x);
+ if (i == 0) {
+ // Only the first op is allowed to be a scale up.
+ // (Scaling up *after* scaling down would make it fuzzy.)
+ EXPECT_TRUE(ops[0].scale_factor == 0 || ops[0].scale_factor == 2);
+ } else {
+ // All other operations must be 50% downscales.
+ EXPECT_EQ(ops[i].scale_factor, 2);
+ }
+ }
+ // Check that the scale factors make sense and add up.
+ int tmp = dst;
+ for (int i = static_cast<int>(ops.size() - 1); i >= 0; i--) {
+ EXPECT_EQ(tmp, ops[i].scale_size);
+ if (ops[i].scale_factor == 0) {
+ EXPECT_EQ(i, 0);
+ EXPECT_GT(tmp, src);
+ tmp = src;
+ } else {
+ tmp *= ops[i].scale_factor;
+ }
+ }
+ EXPECT_EQ(tmp, src);
+ }
+
+ void CheckPipeline2(int xsize,
+ int ysize,
+ int dst_xsize,
+ int dst_ysize,
+ const std::string& description) {
+ std::vector<GLHelperScaling::ScalerStage> stages;
+ helper_scaling_->ConvertScalerOpsToScalerStages(
+ content::GLHelper::SCALER_QUALITY_GOOD, gfx::Size(xsize, ysize),
+ gfx::Rect(0, 0, xsize, ysize), gfx::Size(dst_xsize, dst_ysize), false,
+ false, &x_ops_, &y_ops_, &stages);
+ EXPECT_EQ(x_ops_.size(), 0U);
+ EXPECT_EQ(y_ops_.size(), 0U);
+ ValidateScalerStages(content::GLHelper::SCALER_QUALITY_GOOD, stages,
+ gfx::Size(dst_xsize, dst_ysize), "");
+ EXPECT_EQ(PrintStages(stages), description);
+ }
+
+ void CheckOptimizationsTest() {
+ // Basic upscale. X and Y should be combined into one pass.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 2000));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 2000));
+ CheckPipeline2(1024, 768, 2000, 2000, "1024x768 -> 2000x2000 bilinear\n");
+
+ // X scaled 1/2, Y upscaled, should still be one pass.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 512));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 2000));
+ CheckPipeline2(1024, 768, 512, 2000, "1024x768 -> 512x2000 bilinear\n");
+
+ // X upscaled, Y scaled 1/2, one bilinear pass
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 2000));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 384));
+ CheckPipeline2(1024, 768, 2000, 384, "1024x768 -> 2000x384 bilinear\n");
+
+ // X scaled 1/2, Y scaled 1/2, one bilinear pass
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 512));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 384));
+ CheckPipeline2(1024, 768, 512, 384, "1024x768 -> 512x384 bilinear\n");
+
+ // X scaled 1/2, Y scaled to 60%, one bilinear2 pass.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 50));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ CheckPipeline2(100, 100, 50, 60, "100x100 -> 50x60 bilinear2 Y\n");
+
+ // X scaled to 60%, Y scaled 1/2, one bilinear2 pass.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 120));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 50));
+ CheckPipeline2(100, 100, 60, 50, "100x100 -> 60x50 bilinear2 X\n");
+
+ // X scaled to 60%, Y scaled 60%, one bilinear2x2 pass.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 120));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ CheckPipeline2(100, 100, 60, 60, "100x100 -> 60x60 bilinear2x2\n");
+
+ // X scaled to 40%, Y scaled 40%, two bilinear3 passes.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(3, true, 40));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(3, false, 40));
+ CheckPipeline2(100, 100, 40, 40,
+ "100x100 -> 100x40 bilinear3 Y\n"
+ "100x40 -> 40x40 bilinear3 X\n");
+
+ // X scaled to 60%, Y scaled 40%
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 120));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(3, false, 40));
+ CheckPipeline2(100, 100, 60, 40,
+ "100x100 -> 100x40 bilinear3 Y\n"
+ "100x40 -> 60x40 bilinear2 X\n");
+
+ // X scaled to 40%, Y scaled 60%
+ x_ops_.push_back(GLHelperScaling::ScaleOp(3, true, 40));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ CheckPipeline2(100, 100, 40, 60,
+ "100x100 -> 100x60 bilinear2 Y\n"
+ "100x60 -> 40x60 bilinear3 X\n");
+
+ // X scaled to 30%, Y scaled 30%
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 120));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 60));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 30));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 30));
+ CheckPipeline2(100, 100, 30, 30,
+ "100x100 -> 100x30 bilinear4 Y\n"
+ "100x30 -> 30x30 bilinear4 X\n");
+
+ // X scaled to 50%, Y scaled 30%
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 50));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 30));
+ CheckPipeline2(100, 100, 50, 30, "100x100 -> 50x30 bilinear4 Y\n");
+
+ // X scaled to 150%, Y scaled 30%
+ // Note that we avoid combinding X and Y passes
+ // as that would probably be LESS efficient here.
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 150));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 120));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 60));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 30));
+ CheckPipeline2(100, 100, 150, 30,
+ "100x100 -> 100x30 bilinear4 Y\n"
+ "100x30 -> 150x30 bilinear\n");
+
+ // X scaled to 1%, Y scaled 1%
+ x_ops_.push_back(GLHelperScaling::ScaleOp(0, true, 128));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 64));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 32));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 16));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 8));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 4));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 2));
+ x_ops_.push_back(GLHelperScaling::ScaleOp(2, true, 1));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(0, false, 128));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 64));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 32));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 16));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 8));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 4));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 2));
+ y_ops_.push_back(GLHelperScaling::ScaleOp(2, false, 1));
+ CheckPipeline2(100, 100, 1, 1,
+ "100x100 -> 100x32 bilinear4 Y\n"
+ "100x32 -> 100x4 bilinear4 Y\n"
+ "100x4 -> 64x1 bilinear2x2\n"
+ "64x1 -> 8x1 bilinear4 X\n"
+ "8x1 -> 1x1 bilinear4 X\n");
+ }
+
+ std::unique_ptr<gpu::GLInProcessContext> context_;
+ gpu::gles2::GLES2Interface* gl_;
+ std::unique_ptr<content::GLHelper> helper_;
+ std::unique_ptr<content::GLHelperScaling> helper_scaling_;
+ std::deque<GLHelperScaling::ScaleOp> x_ops_, y_ops_;
+};
+
+class GLHelperPixelTest : public GLHelperTest {
+ private:
+ gfx::DisableNullDrawGLBindings enable_pixel_output_;
+};
+
+TEST_F(GLHelperTest, RGBASyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kRGBA_8888_SkColorType, false);
+ EXPECT_EQ(result, true);
+}
+
+TEST_F(GLHelperTest, BGRASyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kBGRA_8888_SkColorType, false);
+ EXPECT_EQ(result, true);
+}
+
+TEST_F(GLHelperTest, RGB565SyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kRGB_565_SkColorType, false);
+ EXPECT_EQ(result, true);
+}
+
+TEST_F(GLHelperTest, RGBAASyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kRGBA_8888_SkColorType, true);
+ EXPECT_EQ(result, true);
+}
+
+TEST_F(GLHelperTest, BGRAASyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kBGRA_8888_SkColorType, true);
+ EXPECT_EQ(result, true);
+}
+
+TEST_F(GLHelperTest, RGB565ASyncReadbackTest) {
+ const int kTestSize = 64;
+ bool result = TestTextureFormatReadback(gfx::Size(kTestSize, kTestSize),
+ kRGB_565_SkColorType, true);
+ EXPECT_EQ(result, true);
+}
+
+int kRGBReadBackSizes[] = {3, 6, 16};
+
+class GLHelperPixelReadbackTest
+ : public GLHelperPixelTest,
+ public ::testing::WithParamInterface<std::tr1::tuple<unsigned int,
+ unsigned int,
+ unsigned int,
+ unsigned int,
+ unsigned int>> {};
+
+// Per pixel tests, all sizes are small so that we can print
+// out the generated bitmaps.
+TEST_P(GLHelperPixelReadbackTest, ScaleTest) {
+ unsigned int q_index = std::tr1::get<0>(GetParam());
+ unsigned int x = std::tr1::get<1>(GetParam());
+ unsigned int y = std::tr1::get<2>(GetParam());
+ unsigned int dst_x = std::tr1::get<3>(GetParam());
+ unsigned int dst_y = std::tr1::get<4>(GetParam());
+
+ for (int flip = 0; flip <= 1; flip++) {
+ for (int pattern = 0; pattern < 3; pattern++) {
+ TestScale(kRGBReadBackSizes[x], kRGBReadBackSizes[y],
+ kRGBReadBackSizes[dst_x], kRGBReadBackSizes[dst_y], pattern,
+ q_index, flip == 1);
+ if (HasFailure()) {
+ return;
+ }
+ }
+ }
+}
+
+// Per pixel tests, all sizes are small so that we can print
+// out the generated bitmaps.
+TEST_P(GLHelperPixelReadbackTest, CropScaleReadbackAndCleanTextureTest) {
+ unsigned int q_index = std::tr1::get<0>(GetParam());
+ unsigned int x = std::tr1::get<1>(GetParam());
+ unsigned int y = std::tr1::get<2>(GetParam());
+ unsigned int dst_x = std::tr1::get<3>(GetParam());
+ unsigned int dst_y = std::tr1::get<4>(GetParam());
+
+ const SkColorType kColorTypes[] = {
+ kAlpha_8_SkColorType, kRGBA_8888_SkColorType, kBGRA_8888_SkColorType};
+ for (size_t color_type = 0; color_type < arraysize(kColorTypes);
+ color_type++) {
+ for (int pattern = 0; pattern < 3; pattern++) {
+ TestCropScaleReadbackAndCleanTexture(
+ kRGBReadBackSizes[x], kRGBReadBackSizes[y], kRGBReadBackSizes[dst_x],
+ kRGBReadBackSizes[dst_y], pattern, kColorTypes[color_type], false,
+ q_index);
+ if (HasFailure())
+ return;
+ }
+ }
+}
+
+INSTANTIATE_TEST_CASE_P(
+ ,
+ GLHelperPixelReadbackTest,
+ ::testing::Combine(
+ ::testing::Range<unsigned int>(0, arraysize(kQualities)),
+ ::testing::Range<unsigned int>(0, arraysize(kRGBReadBackSizes)),
+ ::testing::Range<unsigned int>(0, arraysize(kRGBReadBackSizes)),
+ ::testing::Range<unsigned int>(0, arraysize(kRGBReadBackSizes)),
+ ::testing::Range<unsigned int>(0, arraysize(kRGBReadBackSizes))));
+
+// Validate that all scaling generates valid pipelines.
+TEST_F(GLHelperTest, ValidateScalerPipelines) {
+ int sizes[] = {7, 99, 128, 256, 512, 719, 720, 721, 1920, 2011, 3217, 4096};
+ for (size_t q = 0; q < arraysize(kQualities); q++) {
+ for (size_t x = 0; x < arraysize(sizes); x++) {
+ for (size_t y = 0; y < arraysize(sizes); y++) {
+ for (size_t dst_x = 0; dst_x < arraysize(sizes); dst_x++) {
+ for (size_t dst_y = 0; dst_y < arraysize(sizes); dst_y++) {
+ TestScalerPipeline(q, sizes[x], sizes[y], sizes[dst_x],
+ sizes[dst_y]);
+ if (HasFailure()) {
+ return;
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+// Make sure we don't create overly complicated pipelines
+// for a few common use cases.
+TEST_F(GLHelperTest, CheckSpecificPipelines) {
+ // Upscale should be single pass.
+ CheckPipeline(content::GLHelper::SCALER_QUALITY_GOOD, 1024, 700, 1280, 720,
+ "1024x700 -> 1280x720 bilinear\n");
+ // Slight downscale should use BILINEAR2X2.
+ CheckPipeline(content::GLHelper::SCALER_QUALITY_GOOD, 1280, 720, 1024, 700,
+ "1280x720 -> 1024x700 bilinear2x2\n");
+ // Most common tab capture pipeline on the Pixel.
+ // Should be using two BILINEAR3 passes.
+ CheckPipeline(content::GLHelper::SCALER_QUALITY_GOOD, 2560, 1476, 1249, 720,
+ "2560x1476 -> 2560x720 bilinear3 Y\n"
+ "2560x720 -> 1249x720 bilinear3 X\n");
+}
+
+TEST_F(GLHelperTest, ScalerOpTest) {
+ for (int allow3 = 0; allow3 <= 1; allow3++) {
+ for (int dst = 1; dst < 2049; dst += 1 + (dst >> 3)) {
+ for (int src = 1; src < 2049; src++) {
+ TestAddOps(src, dst, allow3 == 1, (src & 1) == 1);
+ if (HasFailure()) {
+ LOG(ERROR) << "Failed for src=" << src << " dst=" << dst
+ << " allow3=" << allow3;
+ return;
+ }
+ }
+ }
+ }
+}
+
+TEST_F(GLHelperTest, CheckOptimizations) {
+ // Test in baseclass since it is friends with GLHelperScaling
+ CheckOptimizationsTest();
+}
+
+} // namespace content
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