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GLSL gamma: implement some suggestions from Spike - remove redundant glClear, remove matrix changes (not used in programmable pipeline), change filter mode to nearest (no filtering will happen anyway)

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git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@1188 af15c1b1-3010-417e-b628-4374ebc0bcbd
This commit is contained in:
Eric Wasylishen 2015-03-08 21:13:26 +00:00
parent 5f48964315
commit dbed5c9426
1 changed files with 2 additions and 9 deletions
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11
Quake/gl_rmain.c
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@ -184,8 +184,8 @@ void GLSLGamma_GammaCorrect (void)
glBindTexture (GL_TEXTURE_2D, r_gamma_texture);
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8, glwidth, glheight, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
// create shader if needed
@ -203,8 +203,6 @@ void GLSLGamma_GammaCorrect (void)
glBindTexture (GL_TEXTURE_2D, r_gamma_texture);
glCopyTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, glx, gly, glwidth, glheight);
glClear (GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
// draw the texture back to the framebuffer with a fragment shader
GL_UseProgramFunc (r_gamma_program);
GL_Uniform1fFunc (gammaLoc, vid_gamma.value);
@ -214,11 +212,6 @@ void GLSLGamma_GammaCorrect (void)
glDisable (GL_DEPTH_TEST);
glViewport (glx, gly, glwidth, glheight);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, 1, 1, 0, -99999, 99999);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
glBegin (GL_QUADS);
glTexCoord2f (0, 0);