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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "mojo/apps/js/bindings/gl/context.h" | |
| 6 | |
| 7 #include <GLES2/gl2.h> | |
| 8 | |
| 9 #include "gin/arguments.h" | |
| 10 #include "gin/array_buffer.h" | |
| 11 #include "gin/object_template_builder.h" | |
| 12 #include "gin/per_context_data.h" | |
| 13 #include "mojo/public/c/gles2/gles2.h" | |
| 14 #include "mojo/public/cpp/environment/environment.h" | |
| 15 | |
| 16 namespace gin { | |
| 17 template<> | |
| 18 struct Converter<GLboolean> { | |
| 19 static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val, | |
| 20 GLboolean* out) { | |
| 21 bool bool_val = false; | |
| 22 if (!Converter<bool>::FromV8(isolate, val, &bool_val)) | |
| 23 return false; | |
| 24 *out = static_cast<GLboolean>(bool_val); | |
| 25 return true; | |
| 26 } | |
| 27 }; | |
| 28 } | |
| 29 | |
| 30 namespace mojo { | |
| 31 namespace js { | |
| 32 namespace gl { | |
| 33 | |
| 34 gin::WrapperInfo Context::kWrapperInfo = { gin::kEmbedderNativeGin }; | |
| 35 | |
| 36 gin::Handle<Context> Context::Create( | |
| 37 v8::Isolate* isolate, | |
| 38 mojo::Handle handle, | |
| 39 v8::Handle<v8::Function> context_lost_callback) { | |
| 40 return gin::CreateHandle(isolate, | |
| 41 new Context(isolate, handle, context_lost_callback)); | |
| 42 } | |
| 43 | |
| 44 void Context::BufferData(GLenum target, const gin::ArrayBufferView& buffer, | |
| 45 GLenum usage) { | |
| 46 glBufferData(target, static_cast<GLsizeiptr>(buffer.num_bytes()), | |
| 47 buffer.bytes(), usage); | |
| 48 } | |
| 49 | |
| 50 void Context::CompileShader(const gin::Arguments& args, GLuint shader) { | |
| 51 glCompileShader(shader); | |
| 52 GLint compiled = 0; | |
| 53 glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled); | |
| 54 if (!compiled) { | |
| 55 args.ThrowTypeError(std::string("Could not compile shader: ") + | |
| 56 GetShaderInfoLog(shader)); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 GLuint Context::CreateBuffer() { | |
| 61 GLuint result = 0; | |
| 62 glGenBuffers(1, &result); | |
| 63 return result; | |
| 64 } | |
| 65 | |
| 66 void Context::DrawElements(GLenum mode, GLsizei count, GLenum type, | |
| 67 uint64_t indices) { | |
| 68 // This looks scary, but it's what WebGL does too: | |
| 69 // http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.1 | |
| 70 glDrawElements(mode, count, type, reinterpret_cast<void*>(indices)); | |
| 71 } | |
| 72 | |
| 73 GLint Context::GetAttribLocation(GLuint program, const std::string& name) { | |
| 74 return glGetAttribLocation(program, name.c_str()); | |
| 75 } | |
| 76 | |
| 77 std::string Context::GetProgramInfoLog(GLuint program) { | |
| 78 GLint info_log_length = 0; | |
| 79 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &info_log_length); | |
| 80 std::string info_log(info_log_length, 0); | |
| 81 glGetProgramInfoLog(program, info_log_length, NULL, &info_log.at(0)); | |
| 82 return info_log; | |
| 83 } | |
| 84 | |
| 85 std::string Context::GetShaderInfoLog(GLuint shader) { | |
| 86 GLint info_log_length = 0; | |
| 87 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_log_length); | |
| 88 std::string info_log(info_log_length, 0); | |
| 89 glGetShaderInfoLog(shader, info_log_length, NULL, &info_log.at(0)); | |
| 90 return info_log; | |
| 91 } | |
| 92 | |
| 93 GLint Context::GetUniformLocation(GLuint program, const std::string& name) { | |
| 94 return glGetUniformLocation(program, name.c_str()); | |
| 95 } | |
| 96 | |
| 97 void Context::ShaderSource(GLuint shader, const std::string& source) { | |
| 98 const char* source_chars = source.c_str(); | |
| 99 glShaderSource(shader, 1, &source_chars, NULL); | |
| 100 } | |
| 101 | |
| 102 void Context::UniformMatrix4fv(GLint location, GLboolean transpose, | |
| 103 const gin::ArrayBufferView& buffer) { | |
| 104 glUniformMatrix4fv(location, 1, transpose, | |
| 105 static_cast<float*>(buffer.bytes())); | |
| 106 } | |
| 107 | |
| 108 void Context::VertexAttribPointer(GLuint index, GLint size, GLenum type, | |
| 109 GLboolean normalized, GLsizei stride, | |
| 110 uint64_t offset) { | |
| 111 glVertexAttribPointer(index, size, type, normalized, stride, | |
| 112 reinterpret_cast<void*>(offset)); | |
| 113 } | |
| 114 | |
| 115 gin::ObjectTemplateBuilder Context::GetObjectTemplateBuilder( | |
| 116 v8::Isolate* isolate) { | |
| 117 return gin::ObjectTemplateBuilder(isolate) | |
| 118 .SetValue("ARRAY_BUFFER", GL_ARRAY_BUFFER) | |
| 119 .SetValue("COLOR_BUFFER_BIT", GL_COLOR_BUFFER_BIT) | |
| 120 .SetValue("ELEMENT_ARRAY_BUFFER", GL_ELEMENT_ARRAY_BUFFER) | |
| 121 .SetValue("FLOAT", GL_FLOAT) | |
| 122 .SetValue("FRAGMENT_SHADER", GL_FRAGMENT_SHADER) | |
| 123 .SetValue("STATIC_DRAW", GL_STATIC_DRAW) | |
| 124 .SetValue("TRIANGLES", GL_TRIANGLES) | |
| 125 .SetValue("UNSIGNED_SHORT", GL_UNSIGNED_SHORT) | |
| 126 .SetValue("VERTEX_SHADER", GL_VERTEX_SHADER) | |
| 127 .SetMethod("attachShader", glAttachShader) | |
| 128 .SetMethod("bindBuffer", glBindBuffer) | |
| 129 .SetMethod("bufferData", BufferData) | |
| 130 .SetMethod("clear", glClear) | |
| 131 .SetMethod("clearColor", glClearColor) | |
| 132 .SetMethod("compileShader", CompileShader) | |
| 133 .SetMethod("createBuffer", CreateBuffer) | |
| 134 .SetMethod("createProgram", glCreateProgram) | |
| 135 .SetMethod("createShader", glCreateShader) | |
| 136 .SetMethod("deleteShader", glDeleteShader) | |
| 137 .SetMethod("drawElements", DrawElements) | |
| 138 .SetMethod("enableVertexAttribArray", glEnableVertexAttribArray) | |
| 139 .SetMethod("getAttribLocation", GetAttribLocation) | |
| 140 .SetMethod("getProgramInfoLog", GetProgramInfoLog) | |
| 141 .SetMethod("getShaderInfoLog", GetShaderInfoLog) | |
| 142 .SetMethod("getUniformLocation", GetUniformLocation) | |
| 143 .SetMethod("linkProgram", glLinkProgram) | |
| 144 .SetMethod("shaderSource", ShaderSource) | |
| 145 .SetMethod("swapBuffers", MojoGLES2SwapBuffers) | |
| 146 .SetMethod("uniformMatrix4fv", UniformMatrix4fv) | |
| 147 .SetMethod("useProgram", glUseProgram) | |
| 148 .SetMethod("vertexAttribPointer", VertexAttribPointer) | |
| 149 .SetMethod("viewport", glViewport); | |
| 150 } | |
| 151 | |
| 152 Context::Context(v8::Isolate* isolate, | |
| 153 mojo::Handle handle, | |
| 154 v8::Handle<v8::Function> context_lost_callback) { | |
| 155 v8::Handle<v8::Context> context = isolate->GetCurrentContext(); | |
| 156 runner_ = gin::PerContextData::From(context)->runner()->GetWeakPtr(); | |
| 157 context_lost_callback_.Reset(isolate, context_lost_callback); | |
| 158 context_ = MojoGLES2CreateContext(handle.value(), | |
| 159 &ContextLostThunk, | |
| 160 this, | |
| 161 Environment::GetDefaultAsyncWaiter()); | |
| 162 MojoGLES2MakeCurrent(context_); | |
| 163 } | |
| 164 | |
| 165 Context::~Context() { | |
| 166 MojoGLES2DestroyContext(context_); | |
| 167 } | |
| 168 | |
| 169 void Context::ContextLost() { | |
| 170 if (!runner_) | |
| 171 return; | |
| 172 gin::Runner::Scope scope(runner_.get()); | |
| 173 v8::Isolate* isolate = runner_->GetContextHolder()->isolate(); | |
| 174 | |
| 175 v8::Handle<v8::Function> callback = v8::Local<v8::Function>::New( | |
| 176 isolate, context_lost_callback_); | |
| 177 | |
| 178 runner_->Call(callback, runner_->global(), 0, NULL); | |
| 179 } | |
| 180 | |
| 181 void Context::ContextLostThunk(void* closure) { | |
| 182 static_cast<Context*>(closure)->ContextLost(); | |
| 183 } | |
| 184 | |
| 185 } // namespace gl | |
| 186 } // namespace js | |
| 187 } // namespace mojo | |
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