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| 1 // Copyright 2011 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 "cc/output/program_binding.h" | |
| 6 | |
| 7 #include "base/trace_event/trace_event.h" | |
| 8 #include "cc/output/geometry_binding.h" | |
| 9 #include "gpu/command_buffer/client/gles2_interface.h" | |
| 10 | |
| 11 using gpu::gles2::GLES2Interface; | |
| 12 | |
| 13 namespace cc { | |
| 14 | |
| 15 ProgramBindingBase::ProgramBindingBase() | |
| 16 : program_(0), | |
| 17 vertex_shader_id_(0), | |
| 18 fragment_shader_id_(0), | |
| 19 initialized_(false) {} | |
| 20 | |
| 21 ProgramBindingBase::~ProgramBindingBase() { | |
| 22 // If you hit these asserts, you initialized but forgot to call Cleanup(). | |
| 23 DCHECK(!program_); | |
| 24 DCHECK(!vertex_shader_id_); | |
| 25 DCHECK(!fragment_shader_id_); | |
| 26 DCHECK(!initialized_); | |
| 27 } | |
| 28 | |
| 29 bool ProgramBindingBase::Init(GLES2Interface* context, | |
| 30 const std::string& vertex_shader, | |
| 31 const std::string& fragment_shader) { | |
| 32 TRACE_EVENT0("cc", "ProgramBindingBase::init"); | |
| 33 vertex_shader_id_ = LoadShader(context, GL_VERTEX_SHADER, vertex_shader); | |
| 34 if (!vertex_shader_id_) | |
| 35 return false; | |
| 36 | |
| 37 fragment_shader_id_ = | |
| 38 LoadShader(context, GL_FRAGMENT_SHADER, fragment_shader); | |
| 39 if (!fragment_shader_id_) { | |
| 40 context->DeleteShader(vertex_shader_id_); | |
| 41 vertex_shader_id_ = 0; | |
| 42 return false; | |
| 43 } | |
| 44 | |
| 45 program_ = | |
| 46 CreateShaderProgram(context, vertex_shader_id_, fragment_shader_id_); | |
| 47 return !!program_; | |
| 48 } | |
| 49 | |
| 50 bool ProgramBindingBase::Link(GLES2Interface* context) { | |
| 51 context->LinkProgram(program_); | |
| 52 CleanupShaders(context); | |
| 53 if (!program_) | |
| 54 return false; | |
| 55 #ifndef NDEBUG | |
| 56 int linked = 0; | |
| 57 context->GetProgramiv(program_, GL_LINK_STATUS, &linked); | |
| 58 if (!linked) | |
| 59 return false; | |
| 60 #endif | |
| 61 return true; | |
| 62 } | |
| 63 | |
| 64 void ProgramBindingBase::Cleanup(GLES2Interface* context) { | |
| 65 initialized_ = false; | |
| 66 if (!program_) | |
| 67 return; | |
| 68 | |
| 69 DCHECK(context); | |
| 70 context->DeleteProgram(program_); | |
| 71 program_ = 0; | |
| 72 | |
| 73 CleanupShaders(context); | |
| 74 } | |
| 75 | |
| 76 unsigned ProgramBindingBase::LoadShader(GLES2Interface* context, | |
| 77 unsigned type, | |
| 78 const std::string& shader_source) { | |
| 79 unsigned shader = context->CreateShader(type); | |
| 80 if (!shader) | |
| 81 return 0u; | |
| 82 | |
| 83 const char* shader_source_str[] = { shader_source.data() }; | |
| 84 int shader_length[] = { static_cast<int>(shader_source.length()) }; | |
| 85 context->ShaderSource( | |
| 86 shader, 1, | |
| 87 shader_source_str, | |
| 88 shader_length); | |
| 89 context->CompileShader(shader); | |
| 90 #ifndef NDEBUG | |
| 91 int compiled = 0; | |
| 92 context->GetShaderiv(shader, GL_COMPILE_STATUS, &compiled); | |
| 93 if (!compiled) | |
| 94 return 0u; | |
| 95 #endif | |
| 96 return shader; | |
| 97 } | |
| 98 | |
| 99 unsigned ProgramBindingBase::CreateShaderProgram(GLES2Interface* context, | |
| 100 unsigned vertex_shader, | |
| 101 unsigned fragment_shader) { | |
| 102 unsigned program_object = context->CreateProgram(); | |
| 103 if (!program_object) | |
| 104 return 0; | |
| 105 | |
| 106 context->AttachShader(program_object, vertex_shader); | |
| 107 context->AttachShader(program_object, fragment_shader); | |
| 108 | |
| 109 // Bind the common attrib locations. | |
| 110 context->BindAttribLocation( | |
| 111 program_object, GeometryBinding::PositionAttribLocation(), "a_position"); | |
| 112 context->BindAttribLocation( | |
| 113 program_object, GeometryBinding::TexCoordAttribLocation(), "a_texCoord"); | |
| 114 context->BindAttribLocation(program_object, | |
| 115 GeometryBinding::TriangleIndexAttribLocation(), | |
| 116 "a_index"); | |
| 117 | |
| 118 return program_object; | |
| 119 } | |
| 120 | |
| 121 void ProgramBindingBase::CleanupShaders(GLES2Interface* context) { | |
| 122 if (vertex_shader_id_) { | |
| 123 context->DeleteShader(vertex_shader_id_); | |
| 124 vertex_shader_id_ = 0; | |
| 125 } | |
| 126 if (fragment_shader_id_) { | |
| 127 context->DeleteShader(fragment_shader_id_); | |
| 128 fragment_shader_id_ = 0; | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 } // namespace cc | |
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