51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
#include "gl4.h"
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#include "glcache.h"
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GLuint gl4BindRTT(u32 addy, u32 fbw, u32 fbh, u32 channels, u32 fmt)
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{
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if (gl.rtt.fbo) glDeleteFramebuffers(1,&gl.rtt.fbo);
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if (gl.rtt.tex) glcache.DeleteTextures(1,&gl.rtt.tex);
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gl.rtt.TexAddr=addy>>3;
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// Find the smallest power of two texture that fits the viewport
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int fbh2 = 2;
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while (fbh2 < fbh)
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fbh2 *= 2;
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int fbw2 = 2;
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while (fbw2 < fbw)
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fbw2 *= 2;
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if (settings.rend.RenderToTextureUpscale > 1 && !settings.rend.RenderToTextureBuffer)
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{
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fbw *= settings.rend.RenderToTextureUpscale;
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fbh *= settings.rend.RenderToTextureUpscale;
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fbw2 *= settings.rend.RenderToTextureUpscale;
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fbh2 *= settings.rend.RenderToTextureUpscale;
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}
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// Get the currently bound frame buffer object. On most platforms this just gives 0.
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//glGetIntegerv(GL_FRAMEBUFFER_BINDING, &m_i32OriginalFbo);
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// Create a texture for rendering to
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gl.rtt.tex = glcache.GenTexture();
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glcache.BindTexture(GL_TEXTURE_2D, gl.rtt.tex);
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glTexImage2D(GL_TEXTURE_2D, 0, channels, fbw2, fbh2, 0, channels, fmt, 0);
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// Create the object that will allow us to render to the aforementioned texture
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glGenFramebuffers(1, &gl.rtt.fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, gl.rtt.fbo);
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// Attach the texture to the FBO
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl.rtt.tex, 0);
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// Check that our FBO creation was successful
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GLuint uStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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verify(uStatus == GL_FRAMEBUFFER_COMPLETE);
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glViewport(0, 0, fbw, fbh); // TODO CLIP_X/Y min?
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return gl.rtt.fbo;
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}
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