X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=demo_prior;a=blobdiff_plain;f=src%2Fpost.c;h=b78284af298775818c6e2bb1c95a155b53bb9ef4;hp=c1a2a2304df540cc2aa47e0c99a1f3b01bafac34;hb=ca5ddcfae04b0c10505325629d8a59e626811433;hpb=f949c0b80e6e55b95f9fd5a2949eb644e8356dba

diff --git a/src/post.c b/src/post.c
index c1a2a23..b78284a 100644
--- a/src/post.c
+++ b/src/post.c
@@ -1,7 +1,76 @@
+#include <assert.h>
 #include "opengl.h"
 #include "texture.h"
 #include "post.h"
 #include "demo.h"
+#include "opt.h"
+
+static unsigned int fbtex_gltexid[2];
+static unsigned int fbo[2], rbuf_depth[2];
+struct texture fbtex[2];
+int fbtex_cur;
+
+int post_init(void)
+{
+	int i;
+
+	glGenTextures(2, fbtex_gltexid);
+	glGenRenderbuffers(2, rbuf_depth);
+
+	for(i=0; i<2; i++) {
+		fbtex[i].id = fbtex_gltexid[i];
+		fbtex[i].width = 0;
+		fbtex[i].height = 0;
+		fbtex[i].pixels = 0;
+
+		glBindTexture(GL_TEXTURE_2D, fbtex[i].id);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	}
+	return 0;
+}
+
+void post_cleanup(void)
+{
+	if(fbtex_gltexid[0]) {
+		glDeleteTextures(2, fbtex_gltexid);
+	}
+	if(rbuf_depth[0]) {
+		glDeleteRenderbuffers(2, rbuf_depth);
+	}
+	if(fbo[0]) {
+		glDeleteFramebuffers(2, fbo);
+	}
+}
+
+void post_reshape(int x, int y)
+{
+	int i, ifmt;
+
+	if(x != fbtex[0].width || y != fbtex[0].height) {
+		ifmt = opt.srgb ? GL_SRGB_ALPHA : GL_RGBA;
+
+		for(i=0; i<2; i++) {
+			glBindTexture(GL_TEXTURE_2D, fbtex[i].id);
+			glTexImage2D(GL_TEXTURE_2D, 0, ifmt, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
+			fbtex[i].width = x;
+			fbtex[i].height = y;
+
+			glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth[i]);
+			glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, x, y);
+		}
+
+		if(!fbo[0]) {
+			glGenFramebuffers(2, fbo);
+			for(i=0; i<2; i++) {
+				glBindFramebuffer(GL_FRAMEBUFFER, fbo[i]);
+				glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fbtex_gltexid[i], 0);
+				glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbuf_depth[i]);
+			}
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		}
+	}
+}
 
 void overlay(unsigned int tex, float aspect, float alpha)
 {