aboutsummaryrefslogtreecommitdiffhomepage
path: root/bench/GLBench.cpp
blob: 8cf41c205665100d173201a0925bd8fe4a154b0a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * 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 "GLBench.h"

#if SK_SUPPORT_GPU
#include "GrGpu.h"
#include "GrTest.h"
#include "gl/GrGLContext.h"
#include <stdio.h>

const GrGLContext* GLBench::getGLContext(SkCanvas* canvas) {
    // This bench exclusively tests GL calls directly
    if (nullptr == canvas->getGrContext()) {
        return nullptr;
    }
    GrContext* context = canvas->getGrContext();
    GrGpu* gpu = context->getGpu();
    if (!gpu) {
        SkDebugf("Couldn't get Gr gpu.");
        return nullptr;
    }

    const GrGLContext* ctx = gpu->glContextForTesting();
    if (!ctx) {
        SkDebugf("Couldn't get an interface\n");
        return nullptr;
    }

    return this->onGetGLContext(ctx);
}

void GLBench::onPreDraw(SkCanvas* canvas) {
    // This bench exclusively tests GL calls directly
    const GrGLContext* ctx = this->getGLContext(canvas);
    if (!ctx) {
        return;
    }
    this->setup(ctx);
}

void GLBench::onPostDraw(SkCanvas* canvas) {
    // This bench exclusively tests GL calls directly
    const GrGLContext* ctx = this->getGLContext(canvas);
    if (!ctx) {
        return;
    }
    this->teardown(ctx->interface());
}

void GLBench::onDraw(int loops, SkCanvas* canvas) {
    const GrGLContext* ctx = this->getGLContext(canvas);
    if (!ctx) {
        return;
    }
    this->glDraw(loops, ctx);
    canvas->getGrContext()->resetContext();
}

GrGLuint GLBench::CompileShader(const GrGLInterface* gl, const char* shaderSrc, GrGLenum type) {
    GrGLuint shader;
    // Create the shader object
    GR_GL_CALL_RET(gl, shader, CreateShader(type));

    // Load the shader source
    GR_GL_CALL(gl, ShaderSource(shader, 1, &shaderSrc, nullptr));

    // Compile the shader
    GR_GL_CALL(gl, CompileShader(shader));

    // Check for compile time errors
    GrGLint success = GR_GL_INIT_ZERO;
    GrGLchar infoLog[512];
    GR_GL_CALL(gl, GetShaderiv(shader, GR_GL_COMPILE_STATUS, &success));
    if (!success) {
        GR_GL_CALL(gl, GetShaderInfoLog(shader, 512, nullptr, infoLog));
        SkDebugf("ERROR::SHADER::COMPLIATION_FAILED: %s\n", infoLog);
    }

    return shader;
}

GrGLuint GLBench::CreateProgram(const GrGLInterface* gl, const char* vshader, const char* fshader) {

    GrGLuint vertexShader = CompileShader(gl, vshader, GR_GL_VERTEX_SHADER);
    GrGLuint fragmentShader = CompileShader(gl, fshader, GR_GL_FRAGMENT_SHADER);

    GrGLuint shaderProgram;
    GR_GL_CALL_RET(gl, shaderProgram, CreateProgram());
    GR_GL_CALL(gl, AttachShader(shaderProgram, vertexShader));
    GR_GL_CALL(gl, AttachShader(shaderProgram, fragmentShader));
    GR_GL_CALL(gl, LinkProgram(shaderProgram));

    // Check for linking errors
    GrGLint success = GR_GL_INIT_ZERO;
    GrGLchar infoLog[512];
    GR_GL_CALL(gl, GetProgramiv(shaderProgram, GR_GL_LINK_STATUS, &success));
    if (!success) {
        GR_GL_CALL(gl, GetProgramInfoLog(shaderProgram, 512, nullptr, infoLog));
        SkDebugf("Linker Error: %s\n", infoLog);
    }
    GR_GL_CALL(gl, DeleteShader(vertexShader));
    GR_GL_CALL(gl, DeleteShader(fragmentShader));

    return shaderProgram;
}

GrGLuint GLBench::SetupFramebuffer(const GrGLInterface* gl, int screenWidth, int screenHeight) {
    //Setup framebuffer
    GrGLuint texture;
    GR_GL_CALL(gl, GenTextures(1, &texture));
    GR_GL_CALL(gl, ActiveTexture(GR_GL_TEXTURE7));
    GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, texture));
    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
    GR_GL_CALL(gl, TexImage2D(GR_GL_TEXTURE_2D,
                              0, //level
                              GR_GL_RGBA, //internal format
                              screenWidth, // width
                              screenHeight, // height
                              0, //border
                              GR_GL_RGBA, //format
                              GR_GL_UNSIGNED_BYTE, // type
                              nullptr));

    // bind framebuffer
    GrGLuint framebuffer;
    GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
    GR_GL_CALL(gl, GenFramebuffers(1, &framebuffer));
    GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, framebuffer));
    GR_GL_CALL(gl, FramebufferTexture2D(GR_GL_FRAMEBUFFER,
                                        GR_GL_COLOR_ATTACHMENT0,
                                        GR_GL_TEXTURE_2D,
                                        texture, 0));
    GR_GL_CALL(gl, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
    GR_GL_CALL(gl, Viewport(0, 0, screenWidth, screenHeight));
    return texture;
}


void GLBench::DumpImage(const GrGLInterface* gl, uint32_t screenWidth, uint32_t screenHeight,
                        const char* filename) {
    // read back pixels
    SkAutoTArray<uint32_t> readback(screenWidth * screenHeight);
    GR_GL_CALL(gl, ReadPixels(0, // x
                              0, // y
                              screenWidth, // width
                              screenHeight, // height
                              GR_GL_RGBA, //format
                              GR_GL_UNSIGNED_BYTE, //type
                              readback.get()));

    // dump png
    SkBitmap bm;
    if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(screenWidth, screenHeight))) {
        SkDebugf("couldn't allocate bitmap\n");
        return;
    }

    bm.setPixels(readback.get());

    if (!SkImageEncoder::EncodeFile(filename, bm, SkImageEncoder::kPNG_Type, 100)) {
        SkDebugf("------ failed to encode %s\n", filename);
        remove(filename);   // remove any partial file
        return;
    }
}

#endif