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skia2/bench/GLInstancedArraysBench.cpp
Brian Osman f5beefd34d Fix shader linker errors on several GL benchmarks 
These were using an obsolete shader caps bit to manaully declare their
own FP output variable. That led to two outputs (after SkSL added
sk_FragColor), which led to errors about multiple outputs being declared
(without specifying location). SkSL handles all of this, so just use
sk_FragColor directly.

Bug: skia:
Change-Id: Id38657b6bf8c63c8f80d6ae3354a1507734a209f
Reviewed-on: https://skia-review.googlesource.com/73344
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2017-11-17 20:52:26 +00:00

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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
#include "SkCanvas.h"
#include "SkImageEncoder.h"
#if SK_SUPPORT_GPU
#include "GLBench.h"
#include "GrShaderCaps.h"
#include "GrShaderVar.h"
#include "gl/GrGLContext.h"
#include "gl/GrGLInterface.h"
#include "gl/GrGLUtil.h"
#include "../private/GrGLSL.h"
/*
* This is a native GL benchmark for instanced arrays vs vertex buffer objects. To benchmark this
* functionality, we draw n * kDrawMultipier triangles per run. If this number is less than
* kNumTri then we do a single draw, either with instances, or drawArrays. Otherwise we do
* multiple draws.
*
* Additionally, there is a divisor, which if > 0 will act as a multiplier for the number of draws
* issued.
*/
class GLCpuPosInstancedArraysBench : public GLBench {
public:
/*
* Clients can decide to use either:
* kUseOne_VboSetup - one vertex buffer with colors and positions interleaved
* kUseTwo_VboSetup - two vertex buffers, one for colors, one for positions
* kUseInstance_VboSetup - two vertex buffers, one with per vertex indices, one with per
* instance colors
*/
enum VboSetup {
kUseOne_VboSetup,
kUseTwo_VboSetup,
kUseInstance_VboSetup,
};
/*
* drawDiv will act as a multiplier for the number of draws we issue if > 0. ie, 2 will issue
* 2x as many draws, 4 will issue 4x as many draws etc. There is a limit however, which is
* kDrawMultipier.
*/
GLCpuPosInstancedArraysBench(VboSetup vboSetup, int32_t drawDiv)
: fVboSetup(vboSetup)
, fDrawDiv(drawDiv)
, fProgram(0)
, fVAO(0) {
fName = VboSetupToStr(vboSetup, fDrawDiv);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
const GrGLContext* onGetGLContext(const GrGLContext*) override;
void setup(const GrGLContext*) override;
void glDraw(int loops, const GrGLContext*) override;
void teardown(const GrGLInterface*) override;
private:
void setupInstanceVbo(const GrGLInterface*, const SkMatrix*);
void setupDoubleVbo(const GrGLInterface*, const SkMatrix*);
void setupSingleVbo(const GrGLInterface*, const SkMatrix*);
GrGLuint setupShader(const GrGLContext*);
static SkString VboSetupToStr(VboSetup vboSetup, uint32_t drawDiv) {
SkString name("GLInstancedArraysBench");
switch (vboSetup) {
default:
case kUseOne_VboSetup:
name.appendf("_one_%u", drawDiv);
break;
case kUseTwo_VboSetup:
name.appendf("_two_%u", drawDiv);
break;
case kUseInstance_VboSetup:
name.append("_instance");
break;
}
return name;
}
static const GrGLuint kScreenWidth = 800;
static const GrGLuint kScreenHeight = 600;
static const uint32_t kNumTri = 10000;
static const uint32_t kVerticesPerTri = 3;
static const uint32_t kDrawMultiplier = 512;
SkString fName;
VboSetup fVboSetup;
uint32_t fDrawDiv;
SkTArray<GrGLuint> fBuffers;
GrGLuint fProgram;
GrGLuint fVAO;
GrGLuint fTexture;
};
///////////////////////////////////////////////////////////////////////////////////////////////////
GrGLuint GLCpuPosInstancedArraysBench::setupShader(const GrGLContext* ctx) {
const GrShaderCaps* shaderCaps = ctx->caps()->shaderCaps();
const char* version = shaderCaps->versionDeclString();
// setup vertex shader
GrShaderVar aPosition("a_position", kHalf2_GrSLType, GrShaderVar::kIn_TypeModifier);
GrShaderVar aColor("a_color", kHalf3_GrSLType, GrShaderVar::kIn_TypeModifier);
GrShaderVar oColor("o_color", kHalf3_GrSLType, GrShaderVar::kOut_TypeModifier);
SkString vshaderTxt(version);
aPosition.appendDecl(shaderCaps, &vshaderTxt);
vshaderTxt.append(";\n");
aColor.appendDecl(shaderCaps, &vshaderTxt);
vshaderTxt.append(";\n");
oColor.appendDecl(shaderCaps, &vshaderTxt);
vshaderTxt.append(";\n");
vshaderTxt.append(
"void main()\n"
"{\n"
"sk_Position = float4(a_position, 0., 1.);\n"
"o_color = a_color;\n"
"}\n");
// setup fragment shader
SkString fshaderTxt(version);
oColor.setTypeModifier(GrShaderVar::kIn_TypeModifier);
oColor.appendDecl(shaderCaps, &fshaderTxt);
fshaderTxt.append(";\n");
fshaderTxt.append(
"void main()\n"
"{\n"
"sk_FragColor = float4(o_color, 1.0);\n"
"}\n");
return CreateProgram(ctx, vshaderTxt.c_str(), fshaderTxt.c_str());
}
template<typename Func>
static void setup_matrices(int numQuads, Func f) {
// We draw a really small triangle so we are not fill rate limited
for (int i = 0 ; i < numQuads; i++) {
SkMatrix m = SkMatrix::I();
m.setScale(0.0001f, 0.0001f);
f(m);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
const GrGLContext* GLCpuPosInstancedArraysBench::onGetGLContext(const GrGLContext* ctx) {
// We only care about gpus with drawArraysInstanced support
if (!ctx->interface()->fFunctions.fDrawArraysInstanced) {
return nullptr;
}
return ctx;
}
void GLCpuPosInstancedArraysBench::setupInstanceVbo(const GrGLInterface* gl,
const SkMatrix* viewMatrices) {
// We draw all of the instances at a single place because we aren't allowed to have per vertex
// per instance attributes
SkPoint positions[kVerticesPerTri];
positions[0].set(-1.0f, -1.0f);
positions[1].set( 1.0f, -1.0f);
positions[2].set( 1.0f, 1.0f);
viewMatrices[0].mapPointsWithStride(positions, sizeof(SkPoint), kVerticesPerTri);
// setup colors so we can detect we are actually drawing instances(the last triangle will be
// a different color)
GrGLfloat colors[kVerticesPerTri * kNumTri];
for (uint32_t i = 0; i < kNumTri; i++) {
// set colors
uint32_t offset = i * kVerticesPerTri;
float color = i == kNumTri - 1 ? 1.0f : 0.0f;
colors[offset++] = color; colors[offset++] = 0.0f; colors[offset++] = 0.0f;
}
GrGLuint posVBO;
// setup position VBO
GR_GL_CALL(gl, GenBuffers(1, &posVBO));
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, posVBO));
GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(positions), positions, GR_GL_STATIC_DRAW));
GR_GL_CALL(gl, EnableVertexAttribArray(0));
GR_GL_CALL(gl, VertexAttribPointer(0, 2, GR_GL_FLOAT, GR_GL_FALSE, 2 * sizeof(GrGLfloat),
(GrGLvoid*)0));
// setup color VBO
GrGLuint instanceVBO;
GR_GL_CALL(gl, GenBuffers(1, &instanceVBO));
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, instanceVBO));
GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(colors), colors, GR_GL_STATIC_DRAW));
GR_GL_CALL(gl, EnableVertexAttribArray(1));
GR_GL_CALL(gl, VertexAttribPointer(1, 3, GR_GL_FLOAT, GR_GL_FALSE, 3 * sizeof(GrGLfloat),
(GrGLvoid*)0));
GR_GL_CALL(gl, VertexAttribDivisor(1, 1));
fBuffers.push_back(posVBO);
fBuffers.push_back(instanceVBO);
}
void GLCpuPosInstancedArraysBench::setupDoubleVbo(const GrGLInterface* gl,
const SkMatrix* viewMatrices) {
// Constants for our various shader programs
SkPoint positions[kVerticesPerTri * kNumTri];
GrGLfloat colors[kVerticesPerTri * kNumTri * 3];
for (uint32_t i = 0; i < kNumTri; i++) {
SkPoint* position = &positions[i * kVerticesPerTri];
position[0].set(-1.0f, -1.0f);
position[1].set( 1.0f, -1.0f);
position[2].set( 1.0f, 1.0f);
viewMatrices[i].mapPointsWithStride(position, sizeof(SkPoint), kVerticesPerTri);
// set colors
float color = i == kNumTri - 1 ? 1.0f : 0.0f;
uint32_t offset = i * kVerticesPerTri * 3;
for (uint32_t j = 0; j < kVerticesPerTri; j++) {
colors[offset++] = color; colors[offset++] = 0.0f; colors[offset++] = 0.0f;
}
}
GrGLuint posVBO, colorVBO;
// setup position VBO
GR_GL_CALL(gl, GenBuffers(1, &posVBO));
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, posVBO));
GR_GL_CALL(gl, EnableVertexAttribArray(0));
GR_GL_CALL(gl, VertexAttribPointer(0, 2, GR_GL_FLOAT, GR_GL_FALSE, 2 * sizeof(GrGLfloat),
(GrGLvoid*)0));
GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(positions), positions, GR_GL_STATIC_DRAW));
// setup color VBO
GR_GL_CALL(gl, GenBuffers(1, &colorVBO));
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, colorVBO));
GR_GL_CALL(gl, EnableVertexAttribArray(1));
GR_GL_CALL(gl, VertexAttribPointer(1, 3, GR_GL_FLOAT, GR_GL_FALSE, 3 * sizeof(GrGLfloat),
(GrGLvoid*)0));
GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(colors), colors, GR_GL_STATIC_DRAW));
fBuffers.push_back(posVBO);
fBuffers.push_back(colorVBO);
}
struct Vertex {
SkPoint fPositions;
GrGLfloat fColors[3];
};
void GLCpuPosInstancedArraysBench::setupSingleVbo(const GrGLInterface* gl,
const SkMatrix* viewMatrices) {
// Constants for our various shader programs
Vertex vertices[kVerticesPerTri * kNumTri];
for (uint32_t i = 0; i < kNumTri; i++) {
Vertex* v = &vertices[i * kVerticesPerTri];
v[0].fPositions.set(-1.0f, -1.0f);
v[1].fPositions.set( 1.0f, -1.0f);
v[2].fPositions.set( 1.0f, 1.0f);
SkPoint* position = reinterpret_cast<SkPoint*>(v);
viewMatrices[i].mapPointsWithStride(position, sizeof(Vertex), kVerticesPerTri);
// set colors
float color = i == kNumTri - 1 ? 1.0f : 0.0f;
for (uint32_t j = 0; j < kVerticesPerTri; j++) {
uint32_t offset = 0;
v->fColors[offset++] = color; v->fColors[offset++] = 0.0f; v->fColors[offset++] = 0.0f;
v++;
}
}
GrGLuint vbo;
// setup VBO
GR_GL_CALL(gl, GenBuffers(1, &vbo));
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, vbo));
GR_GL_CALL(gl, EnableVertexAttribArray(0));
GR_GL_CALL(gl, EnableVertexAttribArray(1));
GR_GL_CALL(gl, VertexAttribPointer(0, 2, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
(GrGLvoid*)0));
GR_GL_CALL(gl, VertexAttribPointer(1, 3, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
(GrGLvoid*)(sizeof(SkPoint))));
GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(vertices), vertices, GR_GL_STATIC_DRAW));
fBuffers.push_back(vbo);
}
void GLCpuPosInstancedArraysBench::setup(const GrGLContext* ctx) {
const GrGLInterface* gl = ctx->interface();
fTexture = SetupFramebuffer(gl, kScreenWidth, kScreenHeight);
fProgram = this->setupShader(ctx);
// setup matrices
int index = 0;
SkMatrix viewMatrices[kNumTri];
setup_matrices(kNumTri, [&index, &viewMatrices](const SkMatrix& m) {
viewMatrices[index++] = m;
});
// setup VAO
GR_GL_CALL(gl, GenVertexArrays(1, &fVAO));
GR_GL_CALL(gl, BindVertexArray(fVAO));
switch (fVboSetup) {
case kUseOne_VboSetup:
this->setupSingleVbo(gl, viewMatrices);
break;
case kUseTwo_VboSetup:
this->setupDoubleVbo(gl, viewMatrices);
break;
case kUseInstance_VboSetup:
this->setupInstanceVbo(gl, viewMatrices);
break;
}
// clear screen
GR_GL_CALL(gl, ClearColor(0.03f, 0.03f, 0.03f, 1.0f));
GR_GL_CALL(gl, Clear(GR_GL_COLOR_BUFFER_BIT));
// set us up to draw
GR_GL_CALL(gl, UseProgram(fProgram));
GR_GL_CALL(gl, BindVertexArray(fVAO));
}
void GLCpuPosInstancedArraysBench::glDraw(int loops, const GrGLContext* ctx) {
const GrGLInterface* gl = ctx->interface();
uint32_t maxTrianglesPerFlush = fDrawDiv == 0 ? kNumTri :
kDrawMultiplier / fDrawDiv;
uint32_t trianglesToDraw = loops * kDrawMultiplier;
if (kUseInstance_VboSetup == fVboSetup) {
while (trianglesToDraw > 0) {
uint32_t triangles = SkTMin(trianglesToDraw, maxTrianglesPerFlush);
GR_GL_CALL(gl, DrawArraysInstanced(GR_GL_TRIANGLES, 0, kVerticesPerTri, triangles));
trianglesToDraw -= triangles;
}
} else {
while (trianglesToDraw > 0) {
uint32_t triangles = SkTMin(trianglesToDraw, maxTrianglesPerFlush);
GR_GL_CALL(gl, DrawArrays(GR_GL_TRIANGLES, 0, kVerticesPerTri * triangles));
trianglesToDraw -= triangles;
}
}
#if 0
//const char* filename = "/data/local/tmp/out.png";
SkString filename("out");
filename.appendf("_%s.png", this->getName());
DumpImage(gl, kScreenWidth, kScreenHeight, filename.c_str());
#endif
}
void GLCpuPosInstancedArraysBench::teardown(const GrGLInterface* gl) {
GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, 0));
GR_GL_CALL(gl, BindVertexArray(0));
GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, 0));
GR_GL_CALL(gl, DeleteTextures(1, &fTexture));
GR_GL_CALL(gl, DeleteProgram(fProgram));
GR_GL_CALL(gl, DeleteBuffers(fBuffers.count(), fBuffers.begin()));
GR_GL_CALL(gl, DeleteVertexArrays(1, &fVAO));
fBuffers.reset();
}
///////////////////////////////////////////////////////////////////////////////
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseInstance_VboSetup, 0) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 0) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 0) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 1) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 1) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 2) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 2) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 4) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 4) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseOne_VboSetup, 8) )
DEF_BENCH( return new GLCpuPosInstancedArraysBench(GLCpuPosInstancedArraysBench::kUseTwo_VboSetup, 8) )
#endif
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