I have a problem where I have YUV, but UV texture is embedded into one texture.. How would I convert Y-UV into RGB ?
const char* pFragmentShaderSource = "\ precision highp float;\ uniform sampler2D gsuTexture0;\ uniform sampler2D gsuTexture1;\ uniform sampler2D gsuTexture2;\ varying vec2 gsvTexCoordLuma;\ varying vec2 gsvTexCoordChroma;\ \ void main()\ {\ float y = texture2D(gsuTexture0, gsvTexCoordLuma).r;\ float u = texture2D(gsuTexture1, gsvTexCoordChroma).r;\ float v = texture2D(gsuTexture2, gsvTexCoordChroma).r;\ u = u - 0.5;\ v = v - 0.5;\ vec3 rgb;\ rgb.r = y + (1.403 * v);\ rgb.g = y - (0.344 * u) - (0.714 * v);\ rgb.b = y + (1.770 * u);\ gl_FragColor = vec4(rgb, 1.0);\ }"; // TODO: optimization in Shader int32_t sx = bitmap_.dx() / bitmap_uv.dx(); int32_t sy = bitmap_.dy() / bitmap_uv.dy(); unsigned int textures[2]; glGenTextures(2, &textures[0]); glBindTexture(GL_TEXTURE_2D, textures[0]); glBindTexture(GL_TEXTURE_2D, textures[1]); // set the texture wrapping parameters glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // set texture wrapping to GL_REPEAT (default wrapping method) glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // set texture filtering parameters glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, bitmap_.dx(), bitmap_.dy(), 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, bitmap_.ptr()); glGenerateMipmap(GL_TEXTURE_2D); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, textures[0]); glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, bitmap_uv.dx(), bitmap_uv.dy(), 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, bitmap_uv.ptr()); glGenerateMipmap(GL_TEXTURE_2D); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, textures[1]); setBitmapVertices(a, ab, ad, m_bitmapVBO); udi::BitmapShader *shader = m_bitmapShaderNV12; if (m_shaderPtr != shader) { glUseProgram(shader->getShaderProgram()); m_shaderPtr = shader; } glEnableVertexAttribArray(shader->posAttrib); glVertexAttribPointer(shader->posAttrib, NUM_VERTEX_COMPONENTS, GL_FLOAT, GL_FALSE, (NUM_VERTEX_COMPONENTS + NUM_TEX_COMPONENTS) * sizeof(GLfloat), 0); glEnableVertexAttribArray(shader-> ); glVertexAttribPointer(shader->texAttrib, NUM_TEX_COMPONENTS, GL_FLOAT, GL_FALSE, (NUM_TEX_COMPONENTS + NUM_VERTEX_COMPONENTS) * sizeof(GLfloat), (void*)(NUM_VERTEX_COMPONENTS * sizeof(GLfloat))); glUniformMatrix4fv(shader->matrixLocation, 1, GL_FALSE, m_transformationMatrix); glUniform1i(glGetAttribLocation(shader->getShaderProgram(), "textureY"), 0); glUniform1i(glGetAttribLocation(shader->getShaderProgram(), "textureUV"), 1); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); glDeleteTextures(2, &textures[0]); 
