gpu: Run texture upload perf test with different texture formats.

gpu/perftests/texture_upload_perftest.cc

 // Copyright 2015 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 <algorithm>
 #include <vector>
 
 #include "base/containers/small_map.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "gpu/perftests/measurements.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/perf/perf_test.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
+#include "ui/gl/gl_enums.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_timing.h"
 #include "ui/gl/scoped_make_current.h"
 
 namespace gpu {
 namespace {
 
 const int kUploadPerfWarmupRuns = 10;
 const int kUploadPerfTestRuns = 100;
 
@@ skipping 41 matching lines @@
       scoped_ptr<char> error_log(new char[len]);
       glGetShaderInfoLog(shader, len, NULL, error_log.get());
       LOG(ERROR) << "Error compiling shader: " << error_log.get();
     }
   }
   CHECK_NE(0, compiled);
   return shader;
 }
 
 void GenerateTextureData(const gfx::Size& size,
+                         GLenum format,
                          const int seed,
                          std::vector<uint8>* const pixels) {
-  pixels->resize(size.GetArea() * 4);
-  for (int y = 0; y < size.height(); ++y) {
-    for (int x = 0; x < size.width(); ++x) {
-      const size_t offset = (y * size.width() + x) * 4;
-      pixels->at(offset) = (y + seed) % 64;
-      pixels->at(offset + 1) = (x + seed) % 128;
-      pixels->at(offset + 2) = (y + x + seed) % 256;
-      pixels->at(offset + 3) = 255;
+  DCHECK(format == GL_RGBA || format == GL_LUMINANCE || format == GL_RED_EXT);
+  int bytes_per_pixel = format == GL_RGBA ? 4 : 1;

[reveman, 2015/03/03 21:59:40]

If all you use is bytes_per_pixel in this function then maybe it's better to
have that be a function argument than format.

[Daniele Castagna, 2015/03/06 17:29:16]

Done.

+  int bytes = size.GetArea() * bytes_per_pixel;
+  pixels->resize(bytes);
+  for (int i = 0; i < bytes; ++i) {
+    int channel = i % bytes_per_pixel;
+    if (channel == 3) {  // Alpha channel.
+      pixels->at(i) = 255;
+    } else {
+      pixels->at(i) = (i + (seed << 2)) % (32 << channel);
     }
   }
 }
 
+// Compare a buffer containing pixels in a specified format to GL_RGBA buffer
+// where the former buffer have been uploaded as a texture and drawn on the
+// RGBA buffer.
+bool CompareBufferToRGBABuffer(GLenum format,
+                               const std::vector<uint8>& pixels,
+                               const std::vector<uint8>& pixels_rgba) {
+  DCHECK(format == GL_RGBA || format == GL_LUMINANCE || format == GL_RED_EXT);

[reveman, 2015/03/03 21:59:40]

how about a default: NOTREACHED() case in the switch statement below instead?

[Daniele Castagna, 2015/03/06 17:29:16]

Done.

+  for (size_t i = 0; i < pixels.size(); i += 4) {
+    switch (format) {
+      case GL_RED_EXT:  // (R_t, 0, 0, 1)
+        if (pixels_rgba[i] != pixels[i / 4] || pixels_rgba[i + 1] != 0 ||
+            pixels_rgba[i + 2] != 0 || pixels_rgba[i + 3] != 255) {
+          return false;
+        }
+        break;
+      case GL_LUMINANCE:  // (L_t, L_t, L_t, 1)
+        if (pixels_rgba[i] != pixels[i / 4] ||
+            pixels_rgba[i + 1] != pixels[i / 4] ||
+            pixels_rgba[i + 2] != pixels[i / 4] || pixels_rgba[i + 3] != 255) {
+          return false;
+        }
+        break;
+      case GL_RGBA:  // (R_t, G_t, B_t, A_t)
+        if (pixels_rgba[i] != pixels[i] ||
+            pixels_rgba[i + 1] != pixels[i + 1] ||
+            pixels_rgba[i + 2] != pixels[i + 2] ||
+            pixels_rgba[i + 3] != pixels[i + 3]) {
+          return false;
+        }
+        break;
+    }
+  }
+  return true;
+}
+
 // PerfTest to check costs of texture upload at different stages
 // on different platforms.
 class TextureUploadPerfTest : public testing::Test {
  public:
   TextureUploadPerfTest() : fbo_size_(1024, 1024) {}
 
   // Overridden from testing::Test
   void SetUp() override {
     // Initialize an offscreen surface and a gl context.
     gfx::GLSurface::InitializeOneOff();
@@ skipping 93 matching lines @@
     gl_context_ = nullptr;
     surface_ = nullptr;
   }
 
  protected:
   // Upload and draw on the offscren surface.
   // Return a list of pair. Each pair describe a gl operation and the wall
   // time elapsed in milliseconds.
   std::vector<Measurement> UploadAndDraw(const gfx::Size& size,
                                          const std::vector<uint8>& pixels,
-                                         const GLenum format,
-                                         const GLenum type) {
+                                         const GLenum format) {
     MeasurementTimers total_timers(gpu_timing_client_.get());
     GLuint texture_id = 0;
 
     MeasurementTimers tex_timers(gpu_timing_client_.get());
     glActiveTexture(GL_TEXTURE0);
     glGenTextures(1, &texture_id);
     glBindTexture(GL_TEXTURE_2D, texture_id);
 
     glTexImage2D(GL_TEXTURE_2D, 0, format, size.width(), size.height(), 0,
-                 format, type, &pixels[0]);
+                 format, GL_UNSIGNED_BYTE, &pixels[0]);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     CheckNoGlError();
     tex_timers.Record();
 
     MeasurementTimers draw_timers(gpu_timing_client_.get());
     glUseProgram(program_object_);
     glUniform1i(sampler_location_, 0);
@@ skipping 11 matching lines @@
 
     MeasurementTimers finish_timers(gpu_timing_client_.get());
     glFinish();
     CheckNoGlError();
     finish_timers.Record();
     total_timers.Record();
 
     glDeleteTextures(1, &texture_id);
 
     std::vector<uint8> pixels_rendered(size.GetArea() * 4);
-    glReadPixels(0, 0, size.width(), size.height(), GL_RGBA, type,
+    glReadPixels(0, 0, size.width(), size.height(), GL_RGBA, GL_UNSIGNED_BYTE,
                  &pixels_rendered[0]);
     CheckNoGlError();
-
-    // TODO(dcastagna): don't assume the format of the texture and do
-    // the appropriate format conversion.
-    EXPECT_EQ(static_cast<GLenum>(GL_RGBA), format);
-    EXPECT_EQ(pixels, pixels_rendered);
+    EXPECT_THAT(format, testing::AnyOf(GL_RGBA, GL_LUMINANCE, GL_RED_EXT));
+    EXPECT_TRUE(CompareBufferToRGBABuffer(format, pixels, pixels_rendered))
+        << "Format is: " << gfx::GLEnums::GetStringEnum(format);
 
     std::vector<Measurement> measurements;
     bool gpu_timer_errors =
         gpu_timing_client_->IsAvailable() &&
         gpu_timing_client_->CheckAndResetTimerErrors();
     if (!gpu_timer_errors) {
       measurements.push_back(total_timers.GetAsMeasurement("total"));
       measurements.push_back(tex_timers.GetAsMeasurement("teximage2d"));
       measurements.push_back(draw_timers.GetAsMeasurement("drawarrays"));
       measurements.push_back(finish_timers.GetAsMeasurement("finish"));
     }
     return measurements;
   }
 
-  void RunUploadAndDrawMultipleTimes(const gfx::Size& size) {
+  void RunUploadAndDrawMultipleTimes(const gfx::Size& size,
+                                     const GLenum format) {
     std::vector<uint8> pixels;
     base::SmallMap<std::map<std::string, Measurement>>
         aggregates;  // indexed by name
     int successful_runs = 0;
     for (int i = 0; i < kUploadPerfWarmupRuns + kUploadPerfTestRuns; ++i) {
-      GenerateTextureData(size, i + 1, &pixels);
-      auto run = UploadAndDraw(size, pixels, GL_RGBA, GL_UNSIGNED_BYTE);
+      GenerateTextureData(size, format, i + 1, &pixels);
+      auto run = UploadAndDraw(size, pixels, format);
       if (i < kUploadPerfWarmupRuns || !run.size()) {
         continue;
       }
       successful_runs++;
       for (const Measurement& measurement : run) {
         auto& aggregate = aggregates[measurement.name];
         aggregate.name = measurement.name;
         aggregate.Increment(measurement);
       }
     }
+    std::string suffix = base::StringPrintf(
+        "_%d_%s", size.width(), gfx::GLEnums::GetStringEnum(format).c_str());
     if (successful_runs) {
       for (const auto& entry : aggregates) {
         const auto m = entry.second.Divide(successful_runs);
-        m.PrintResult(base::StringPrintf("_%d", size.width()));
+        m.PrintResult(suffix);
       }
     }
-    perf_test::PrintResult("sample_runs", "", "",
+    perf_test::PrintResult("sample_runs", suffix, "",
                            static_cast<size_t>(successful_runs), "laps", true);
   }
 
   const gfx::Size fbo_size_;  // for the fbo
   scoped_refptr<gfx::GLContext> gl_context_;
   scoped_refptr<gfx::GLSurface> surface_;
   scoped_refptr<gfx::GPUTimingClient> gpu_timing_client_;
 
   GLuint color_texture_ = 0;
   GLuint framebuffer_object_ = 0;
   GLuint vertex_shader_ = 0;
   GLuint fragment_shader_ = 0;
   GLuint program_object_ = 0;
   GLint sampler_location_ = -1;
   GLuint vertex_buffer_ = 0;
 };
 
 // Perf test that generates, uploads and draws a texture on a surface repeatedly
 // and prints out aggregated measurements for all the runs.
 TEST_F(TextureUploadPerfTest, glTexImage2d) {
   int sizes[] = {128, 256, 512, 1024};
+  std::vector<GLenum> formats;
+  formats.push_back(GL_RGBA);
+  // Used by default for ResourceProvider::yuv_resource_format_.
+  formats.push_back(GL_LUMINANCE);
+
+  ui::ScopedMakeCurrent smc(gl_context_.get(), surface_.get());
+  bool has_texture_rg = gl_context_->HasExtension("GL_EXT_texture_rg") ||
+                        gl_context_->HasExtension("GL_ARB_texture_rg");
+
+  if (has_texture_rg) {
+    // Used as ResourceProvider::yuv_resource_format_ if
+    // {ARB,EXT}_texture_rg is available.
+    formats.push_back(GL_RED_EXT);
+  }
   for (int side : sizes) {
     ASSERT_GE(fbo_size_.width(), side);
     ASSERT_GE(fbo_size_.height(), side);
+    gfx::Size size(side, side);
 
-    gfx::Size size(side, side);
-    ui::ScopedMakeCurrent smc(gl_context_.get(), surface_.get());
-    GenerateVertexBuffer(size);
+    for (GLenum format : formats) {
+      GenerateVertexBuffer(size);
+      DCHECK_NE(0u, framebuffer_object_);
+      glBindFramebufferEXT(GL_FRAMEBUFFER, framebuffer_object_);
 
-    DCHECK_NE(0u, framebuffer_object_);
-    glBindFramebufferEXT(GL_FRAMEBUFFER, framebuffer_object_);
-
-    RunUploadAndDrawMultipleTimes(size);
+      RunUploadAndDrawMultipleTimes(size, format);
+    }
   }
 }
 
 }  // namespace
 }  // namespace gpu