Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/ColorTextureOpenGLProgram.cpp @ 590:5430bcffba57
FloatTextureSceneLayer
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 26 Apr 2019 11:33:57 +0200 |
| parents | 5b4890d289cf |
| children |
| rev | line source |
|---|---|
| 585 | 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 "ColorTextureOpenGLProgram.h" | |
| 23 | |
| 24 namespace OrthancStone | |
| 25 { | |
| 586 | 26 namespace Internals |
| 585 | 27 { |
| 586 | 28 ColorTextureOpenGLProgram::ColorTextureOpenGLProgram(OpenGL::IOpenGLContext& context) : |
| 585 | 29 context_(context) |
| 30 { | |
| 31 static const char* VERTEX_SHADER = | |
| 32 "attribute vec2 a_texcoord; \n" | |
| 33 "attribute vec4 a_position; \n" | |
| 34 "uniform mat4 u_matrix; \n" | |
| 35 "varying vec2 v_texcoord; \n" | |
| 36 "void main() \n" | |
| 37 "{ \n" | |
| 38 " gl_Position = u_matrix * a_position; \n" | |
| 39 " v_texcoord = a_texcoord; \n" | |
| 40 "}"; | |
| 41 | |
| 42 static const char* FRAGMENT_SHADER = | |
| 43 "uniform sampler2D u_texture; \n" | |
| 44 "varying vec2 v_texcoord; \n" | |
| 45 "void main() \n" | |
| 46 "{ \n" | |
| 47 " gl_FragColor = texture2D(u_texture, v_texcoord); \n" | |
| 48 "}"; | |
| 49 | |
| 50 static const float POSITIONS[COMPONENTS * COUNT] = { | |
| 51 0, 0, | |
| 52 0, 1, | |
| 53 1, 0, | |
| 54 1, 0, | |
| 55 0, 1, | |
| 56 1, 1 | |
| 57 }; | |
| 58 | |
| 59 context_.MakeCurrent(); | |
| 60 | |
| 586 | 61 program_.reset(new OpenGL::OpenGLProgram); |
| 585 | 62 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); |
| 63 | |
| 64 positionLocation_ = program_->GetAttributeLocation("a_position"); | |
| 65 textureLocation_ = program_->GetAttributeLocation("a_texcoord"); | |
| 66 | |
| 67 glGenBuffers(2, buffers_); | |
| 68 | |
| 69 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 70 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * COMPONENTS * COUNT, POSITIONS, GL_STATIC_DRAW); | |
| 71 | |
| 72 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 73 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * COMPONENTS * COUNT, POSITIONS, GL_STATIC_DRAW); | |
| 74 } | |
| 75 | |
| 76 | |
| 77 ColorTextureOpenGLProgram::~ColorTextureOpenGLProgram() | |
| 78 { | |
| 79 context_.MakeCurrent(); | |
| 80 glDeleteBuffers(2, buffers_); | |
| 81 } | |
| 82 | |
| 83 | |
| 586 | 84 void ColorTextureOpenGLProgram::Apply(OpenGL::OpenGLTexture& texture, |
| 585 | 85 const AffineTransform2D& transform, |
| 86 bool useAlpha) | |
| 87 { | |
| 88 context_.MakeCurrent(); | |
| 89 program_->Use(); | |
| 90 | |
| 91 AffineTransform2D scale = AffineTransform2D::CreateScaling | |
| 92 (texture.GetWidth(), texture.GetHeight()); | |
| 93 | |
| 94 AffineTransform2D t = AffineTransform2D::Combine(transform, scale); | |
| 95 | |
| 96 float m[16]; | |
| 97 t.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight()); | |
| 98 | |
| 99 texture.Bind(program_->GetUniformLocation("u_texture")); | |
| 100 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 101 | |
| 102 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]); | |
| 103 glEnableVertexAttribArray(positionLocation_); | |
| 104 glVertexAttribPointer(positionLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 105 | |
| 106 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]); | |
| 107 glEnableVertexAttribArray(textureLocation_); | |
| 108 glVertexAttribPointer(textureLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 109 | |
| 110 if (useAlpha) | |
| 111 { | |
| 112 glEnable(GL_BLEND); | |
|
590
5430bcffba57
FloatTextureSceneLayer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
586
diff
changeset
|
113 //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
|
5430bcffba57
FloatTextureSceneLayer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
586
diff
changeset
|
114 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); |
| 585 | 115 glDrawArrays(GL_TRIANGLES, 0, COUNT); |
| 116 glDisable(GL_BLEND); | |
| 117 } | |
| 118 else | |
| 119 { | |
| 120 glDrawArrays(GL_TRIANGLES, 0, COUNT); | |
| 121 } | |
| 122 | |
| 123 glDisableVertexAttribArray(positionLocation_); | |
| 124 glDisableVertexAttribArray(textureLocation_); | |
| 125 } | |
| 126 } | |
| 127 } |