Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLTextureProgram.cpp @ 920:5ca418d6579e refactor-viewport-controller
Close branch refactor-viewport-controller.
| author | Alain Mazy <am@osimis.io> |
|---|---|
| date | Fri, 19 Jul 2019 14:15:49 +0000 |
| parents | e3f21a265be5 |
| children | 1091b2adeb5a |
| rev | line source |
|---|---|
| 591 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "OpenGLTextureProgram.h" | |
|
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
591
diff
changeset
|
23 #include "OpenGLShaderVersionDirective.h" |
| 591 | 24 |
| 25 static const unsigned int COMPONENTS = 2; | |
| 26 static const unsigned int COUNT = 6; // 2 triangles in 2D | |
| 27 | |
| 28 static const char* VERTEX_SHADER = | |
|
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
591
diff
changeset
|
29 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 591 | 30 "attribute vec2 a_texcoord; \n" |
| 31 "attribute vec4 a_position; \n" | |
| 32 "uniform mat4 u_matrix; \n" | |
| 33 "varying vec2 v_texcoord; \n" | |
| 34 "void main() \n" | |
| 35 "{ \n" | |
| 36 " gl_Position = u_matrix * a_position; \n" | |
| 37 " v_texcoord = a_texcoord; \n" | |
| 38 "}"; | |
| 39 | |
| 40 | |
| 41 namespace OrthancStone | |
| 42 { | |
| 43 namespace Internals | |
| 44 { | |
| 45 void OpenGLTextureProgram::InitializeExecution(OpenGL::OpenGLTexture& texture, | |
| 46 const AffineTransform2D& transform) | |
| 47 { | |
| 48 context_.MakeCurrent(); | |
| 49 program_->Use(); | |
| 50 | |
| 51 AffineTransform2D scale = AffineTransform2D::CreateScaling | |
| 52 (texture.GetWidth(), texture.GetHeight()); | |
| 53 | |
| 54 AffineTransform2D t = AffineTransform2D::Combine(transform, scale); | |
| 55 | |
| 56 float m[16]; | |
| 57 t.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight()); | |
| 58 | |
| 59 texture.Bind(program_->GetUniformLocation("u_texture")); | |
| 60 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 61 | |
| 62 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 63 glEnableVertexAttribArray(positionLocation_); | |
| 64 glVertexAttribPointer(positionLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 65 | |
| 66 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 67 glEnableVertexAttribArray(textureLocation_); | |
| 68 glVertexAttribPointer(textureLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 69 } | |
| 70 | |
| 71 | |
| 72 void OpenGLTextureProgram::FinalizeExecution() | |
| 73 { | |
| 74 glDisableVertexAttribArray(positionLocation_); | |
| 75 glDisableVertexAttribArray(textureLocation_); | |
| 76 } | |
| 77 | |
| 78 | |
| 79 OpenGLTextureProgram::OpenGLTextureProgram(OpenGL::IOpenGLContext& context, | |
| 80 const char* fragmentShader) : | |
| 81 context_(context) | |
| 82 { | |
| 83 static const float POSITIONS[COMPONENTS * COUNT] = { | |
| 84 0, 0, | |
| 85 0, 1, | |
| 86 1, 0, | |
| 87 1, 0, | |
| 88 0, 1, | |
| 89 1, 1 | |
| 90 }; | |
| 91 | |
| 92 context_.MakeCurrent(); | |
| 93 | |
| 94 program_.reset(new OpenGL::OpenGLProgram); | |
| 95 program_->CompileShaders(VERTEX_SHADER, fragmentShader); | |
| 96 | |
| 97 positionLocation_ = program_->GetAttributeLocation("a_position"); | |
| 98 textureLocation_ = program_->GetAttributeLocation("a_texcoord"); | |
| 99 | |
| 100 glGenBuffers(2, buffers_); | |
| 101 | |
| 102 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 103 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * COMPONENTS * COUNT, POSITIONS, GL_STATIC_DRAW); | |
| 104 | |
| 105 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 106 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * COMPONENTS * COUNT, POSITIONS, GL_STATIC_DRAW); | |
| 107 } | |
| 108 | |
| 109 | |
| 110 OpenGLTextureProgram::~OpenGLTextureProgram() | |
| 111 { | |
| 112 context_.MakeCurrent(); | |
| 113 glDeleteBuffers(2, buffers_); | |
| 114 } | |
| 115 | |
| 116 | |
| 117 void OpenGLTextureProgram::Execution::DrawTriangles() | |
| 118 { | |
| 119 glDrawArrays(GL_TRIANGLES, 0, COUNT); | |
| 120 } | |
| 121 } | |
| 122 } |