X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=demo_prior;a=blobdiff_plain;f=src%2Fpost.c;fp=src%2Fpost.c;h=c1a2a2304df540cc2aa47e0c99a1f3b01bafac34;hp=0000000000000000000000000000000000000000;hb=3a9f6854df479d81442273c9d0b133c49c5c8f66;hpb=0b24071f728b7c8550daa1b7aa7c4012cb70ef4c

diff --git a/src/post.c b/src/post.c
new file mode 100644
index 0000000..c1a2a23
--- /dev/null
+++ b/src/post.c
@@ -0,0 +1,49 @@
+#include "opengl.h"
+#include "texture.h"
+#include "post.h"
+#include "demo.h"
+
+void overlay(unsigned int tex, float aspect, float alpha)
+{
+	float xscale = aspect / win_aspect;
+
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
+	glMatrixMode(GL_PROJECTION);
+	glPushMatrix();
+	glLoadIdentity();
+	glScalef(xscale, 1.0, 1.0);
+
+	glPushAttrib(GL_ENABLE_BIT);
+	glDisable(GL_DEPTH_TEST);
+	glDisable(GL_LIGHTING);
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glEnable(GL_TEXTURE_2D);
+
+	glBindTexture(GL_TEXTURE_2D, tex);
+
+	glBegin(GL_QUADS);
+	glColor4f(1, 1, 1, alpha);
+	glTexCoord2f(0, 1);
+	glVertex2f(-1, -1);
+	glTexCoord2f(1, 1);
+	glVertex2f(1, -1);
+	glTexCoord2f(1, 0);
+	glVertex2f(1, 1);
+	glTexCoord2f(0, 0);
+	glVertex2f(-1, 1);
+	glEnd();
+
+	glPopAttrib();
+
+	glPopMatrix();
+	glMatrixMode(GL_MODELVIEW);
+	glPopMatrix();
+}
+
+void overlay_tex(struct texture *tex, float alpha)
+{
+	overlay(tex->id, (float)tex->width / tex->height, alpha);
+}