UnrealXR/raylib
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added support for render to texture (use RenderTexture2D)

Browse source 
Now it's possible to render to texture, old postprocessing system will
be removed on next raylib version.
This commit is contained in:
raysan5 2016-03-30 20:09:16 +02:00
parent 1136d4222f
commit 66b096d978
8 changed files with 210 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

118
src/rlgl.c
View file

@ -785,6 +785,20 @@ void rlDisableTexture(void)
#endif
}
void rlEnableRenderTexture(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindFramebuffer(GL_FRAMEBUFFER, id);
#endif
}
void rlDisableRenderTexture(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
}
// Enable depth test
void rlEnableDepthTest(void)
{
@ -803,6 +817,16 @@ void rlDeleteTextures(unsigned int id)
glDeleteTextures(1, &id);
}
// Unload render texture from GPU memory
void rlDeleteRenderTextures(RenderTexture2D target)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDeleteFramebuffers(1, &target.id);
glDeleteTextures(1, &target.texture.id);
glDeleteTextures(1, &target.depth.id);
#endif
}
// Enable rendering to postprocessing FBO
void rlEnablePostproFBO()
{
@ -1163,7 +1187,7 @@ FBO rlglLoadFBO(int width, int height)
glDeleteTextures(1, &fbo.colorTextureId);
glDeleteTextures(1, &fbo.depthTextureId);
}
else TraceLog(INFO, "[FBO ID %i] Framebuffer object created successfully", fbo);
else TraceLog(INFO, "[FBO ID %i] Framebuffer object created successfully", fbo.id);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
@ -1833,6 +1857,98 @@ unsigned int rlglLoadTexture(void *data, int width, int height, int textureForma
return id;
}
// Load a texture to be used for rendering (fbo with color and depth attachments)
RenderTexture2D rlglLoadRenderTexture(int width, int height)
{
RenderTexture2D target;
target.id = 0;
target.texture.id = 0;
target.texture.width = width;
target.texture.height = height;
target.texture.format = UNCOMPRESSED_R8G8B8;
target.texture.mipmaps = 1;
target.depth.id = 0;
target.depth.width = width;
target.depth.height = height;
target.depth.format = 19; //DEPTH_COMPONENT_16BIT
target.depth.mipmaps = 1;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Create the texture that will serve as the color attachment for the framebuffer
glGenTextures(1, &target.texture.id);
glBindTexture(GL_TEXTURE_2D, target.texture.id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, 0);
#define USE_DEPTH_RENDERBUFFER
#if defined(USE_DEPTH_RENDERBUFFER)
// Create the renderbuffer that will serve as the depth attachment for the framebuffer.
glGenRenderbuffers(1, &target.depth.id);
glBindRenderbuffer(GL_RENDERBUFFER, target.depth.id);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
#elif defined(USE_DEPTH_TEXTURE)
// NOTE: We can also use a texture for depth buffer (GL_ARB_depth_texture/GL_OES_depth_texture extension required)
// A renderbuffer is simpler than a texture and could offer better performance on embedded devices
glGenTextures(1, &target.depth.id);
glBindTexture(GL_TEXTURE_2D, target.depth.id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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_DEPTH_COMPONENT, width, height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, 0);
#endif
// Create the framebuffer object
glGenFramebuffers(1, &target.id);
glBindFramebuffer(GL_FRAMEBUFFER, target.id);
// Attach color texture and depth renderbuffer to FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, target.texture.id, 0);
#if defined(USE_DEPTH_RENDERBUFFER)
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, target.depth.id);
#elif defined(USE_DEPTH_TEXTURE)
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, target.depth.id, 0);
#endif
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
TraceLog(WARNING, "Framebuffer object could not be created...");
switch(status)
{
case GL_FRAMEBUFFER_UNSUPPORTED: TraceLog(WARNING, "Framebuffer is unsupported"); break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT: TraceLog(WARNING, "Framebuffer incomplete attachment"); break;
#if defined(GRAPHICS_API_OPENGL_ES2)
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS: TraceLog(WARNING, "Framebuffer incomplete dimensions"); break;
#endif
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: TraceLog(WARNING, "Framebuffer incomplete missing attachment"); break;
default: break;
}
glDeleteTextures(1, &target.texture.id);
glDeleteTextures(1, &target.depth.id);
glDeleteFramebuffers(1, &target.id);
}
else TraceLog(INFO, "[FBO ID %i] Framebuffer object created successfully", target.id);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
return target;
}
// Update already loaded texture in GPU with new data
void rlglUpdateTexture(unsigned int id, int width, int height, int format, void *data)
{
glBindTexture(GL_TEXTURE_2D, id);