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Support float texture data on OpenGL ES 2.0

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raysan5
2018-12-25 15:19:25 +01:00
parent 35a6e9a074
commit 7b8965eb38
7 changed files with 23 additions and 14 deletions
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17
src/rlgl.h
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@@ -2968,7 +2968,7 @@ Matrix GetMatrixModelview()
Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size)
{
Texture2D cubemap = { 0 };
#if defined(GRAPHICS_API_OPENGL_33) // || defined(GRAPHICS_API_OPENGL_ES2)
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// NOTE: SetShaderDefaultLocations() already setups locations for projection and view Matrix in shader
// Other locations should be setup externally in shader before calling the function
@@ -2978,22 +2978,31 @@ Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size)
glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS); // Flag not supported on OpenGL ES 2.0
#endif
// Setup framebuffer
unsigned int fbo, rbo;
glGenFramebuffers(1, &fbo);
glGenRenderbuffers(1, &rbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glBindRenderbuffer(GL_RENDERBUFFER, rbo);
#if defined(GRAPHICS_API_OPENGL_33)
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size, size);
#elif defined(GRAPHICS_API_OPENGL_ES2)
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, size, size);
#endif
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbo);
// Set up cubemap to render and attach to framebuffer
// NOTE: faces are stored with 16 bit floating point values
glGenTextures(1, &cubemap.id);
glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id);
for (unsigned int i = 0; i < 6; i++)
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB16F, size, size, 0, GL_RGB, GL_FLOAT, NULL);
for (unsigned int i = 0; i < 6; i++)
{
#if defined(GRAPHICS_API_OPENGL_33)
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB32F, size, size, 0, GL_RGB, GL_FLOAT, NULL);
#elif defined(GRAPHICS_API_OPENGL_ES2)
if (texFloatSupported) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, NULL);
#endif
}
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#if defined(GRAPHICS_API_OPENGL_33)