1 #version 330 core 2  3 in vec2 _texCoord; 4 out vec4 color; 5  6 uniform sampler2D tex; 7  8 void main() 9 {10     vec2 tc = vec2(_texCoord.x, 1-_texCoord.y);11     color = texture(tex, tc);12     //color = vec4(1.0f, 0.0f, 0.0f, 1.0f);13 }

 1 #include "App.h" 2 #include "EventWorkSpace.h" 3 #include <SOIL/SOIL.h> 4  5 class TextureTest : public EventWorkSpace 6 { 7 public: 8     GLuint vao; 9     GLuint vbo;10     GLuint ebo;11     Program prog;12     GLuint tex;13 14     void loopInit()15     {16         //着色器程序编译17         prog.addShader(Program::ShaderType::VERTEX_SHADER, "glsl/texture.vert.glsl");18         prog.addShader(Program::ShaderType::FREGMENT_SHADER, "glsl/texture.freg.glsl");19         prog.link();20         //--21 22         //定点属性设置23         GLfloat vertices[] = {24             // 定点位置                // 纹理坐标25             0.5f,  0.5f, 0.0f,        1.0f, 1.0f, // 上右26             0.5f, -0.5f, 0.0f,        1.0f, 0.0f, // 下右27             -0.5f, -0.5f, 0.0f,        0.0f, 0.0f, // 下左28             -0.5f,  0.5f, 0.0f,        0.0f, 1.0f  // 上左29         };30         GLuint indices[] = {  31             0, 1, 3, // 第一个三角形32             1, 2, 3  // 第二个三角形33         };34 35         glGenVertexArrays(1, &vao);36         glBindVertexArray(vao);37         glGenBuffers(1, &vbo);38         glGenBuffers(1, &ebo);39         glBindBuffer(GL_ARRAY_BUFFER, vbo);40         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);41 42         glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);43         glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);44         45         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), nullptr);46         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (const void *)(3 * sizeof(GLfloat)));47         glEnableVertexAttribArray(0);48         glEnableVertexAttribArray(1);49         glBindVertexArray(0);50         // --51 52         // 纹理生成53         glGenTextures(1, &tex);54         glBindTexture(GL_TEXTURE_2D, tex);55         56         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);57         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);58         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);59         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);60         61         int width, height;62         unsigned char *image = SOIL_load_image("resources/smile.png", &width, &height, 0, SOIL_LOAD_RGB);63         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);64         glGenerateMipmap(GL_TEXTURE_2D);65         SOIL_free_image_data(image);66         glBindTexture(GL_TEXTURE_2D, 0);67         //--68 69         glClearColor(0.6f, 0.6f, 0.6f, 1.0f);70     }71     void loopContent()72     {73         glClear(GL_COLOR_BUFFER_BIT);74 75         glBindTexture(GL_TEXTURE_2D, tex);76 77         prog.use();78         glBindVertexArray(vao);79         80         glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);81 82         glBindVertexArray(0);83     }84     85 86 };87 88 int main()89 {90     App::init(480, 480, "texture rectangle", false, "window.settings");91     App::run(&TextureTest());92     return 0;93 }