mirror of
https://github.com/brl/mutter.git
synced 2025-01-22 09:29:25 +00:00
* tests/test-shader.c: improved readability of fragment shader
examples by factoring out common bits into FRAGMENT_SHADER_BEGIN and FRAGMENT_SHADER_END macros.
This commit is contained in:
Øyvind Kolås
parent
74c8271db6
commit
aa1e89cc92
@ -1,3 +1,9 @@
|
||||
2008-03-10 Øyvind Kolås <pippin@o-hand.com>
|
||||
|
||||
* tests/test-shader.c: improved readability of fragment shader
|
||||
examples by factoring out common bits into FRAGMENT_SHADER_BEGIN and
|
||||
FRAGMENT_SHADER_END macros.
|
||||
|
||||
2008-03-09 Matthew Allum <mallum@openedhand.com>
|
||||
|
||||
* clutter/clutter-id-pool.c: (clutter_id_pool_free):
|
||||
|
||||
@ -17,128 +17,108 @@ typedef struct
|
||||
gchar *source;
|
||||
} ShaderSource;
|
||||
|
||||
/* a couple of boilerplate defines that are common amongst all the
|
||||
* sample shaders
|
||||
*/
|
||||
|
||||
/* FRAGMENT_SHADER_BEGIN: generate boilerplate with a local vec4 color already initialized,
|
||||
* from a sampler2DRect in a variable tex.
|
||||
*/
|
||||
#define FRAGMENT_SHADER_BEGIN \
|
||||
"uniform sampler2DRect tex;" \
|
||||
"void main (){" \
|
||||
" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));"
|
||||
|
||||
/* FRAGMENT_SHADER_END: apply the changed color to the output buffer correctly blended
|
||||
* with the gl specified color (makes the opacity of actors work correctly).
|
||||
*/
|
||||
#define FRAGMENT_SHADER_END \
|
||||
" gl_FragColor = color;" \
|
||||
" gl_FragColor = gl_FragColor * gl_Color;" \
|
||||
"}"
|
||||
|
||||
static ShaderSource shaders[]=
|
||||
{
|
||||
{"brightness-contrast",
|
||||
|
||||
"uniform float brightness;"
|
||||
"uniform float contrast;"
|
||||
"uniform sampler2DRect pend_s3_tex;"
|
||||
""
|
||||
"void main()"
|
||||
"{"
|
||||
" vec4 pend_s4_result;"
|
||||
" pend_s4_result = texture2DRect(pend_s3_tex, gl_TexCoord[0].xy);"
|
||||
" pend_s4_result.x = (pend_s4_result.x - 0.5)*contrast + brightness + 0.5;"
|
||||
" pend_s4_result.y = (pend_s4_result.y - 0.5)*contrast + brightness + 0.5;"
|
||||
" pend_s4_result.z = (pend_s4_result.z - 0.5)*contrast + brightness + 0.5;"
|
||||
" gl_FragColor = pend_s4_result;"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}",
|
||||
"uniform float brightness, contrast;"
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" color.rgb = (color.rgb - vec3(0.5, 0.5, 0.5)) * contrast + vec3 (brightness + 0.5, brightness + 0.5, brightness + 0.5);"
|
||||
FRAGMENT_SHADER_END
|
||||
},
|
||||
|
||||
{"box-blur",
|
||||
#if GPU_SUPPORTS_DYNAMIC_BRANCHING
|
||||
"uniform float radius ;"
|
||||
"uniform sampler2DRect rectTexture;"
|
||||
""
|
||||
"void main()"
|
||||
"{"
|
||||
" vec4 color = texture2DRect(rectTexture, gl_TexCoord[0].st);"
|
||||
" float u;"
|
||||
" float v;"
|
||||
" int count = 1;"
|
||||
" for (u=-radius;u<radius;u++)"
|
||||
" for (v=-radius;v<radius;v++)"
|
||||
" {"
|
||||
" color += texture2DRect(rectTexture, vec2(gl_TexCoord[0].s + u * 2.0, gl_TexCoord[0].t +v * 2.0));"
|
||||
" count ++;"
|
||||
" }"
|
||||
""
|
||||
" gl_FragColor = color / float(count);"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}"
|
||||
"uniform float radius;"
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
"float u, v;"
|
||||
"int count = 1;"
|
||||
"for (u=-radius;u<radius;u++)"
|
||||
" for (v=-radius;v<radius;v++)"
|
||||
" {"
|
||||
" color += texture2DRect(tex, "
|
||||
" vec2(gl_TexCoord[0].s + u * 2.0, gl_TexCoord[0].t +v * 2.0));"
|
||||
" count ++;"
|
||||
" }"
|
||||
"color = color / float(count);"
|
||||
FRAGMENT_SHADER_END
|
||||
#else
|
||||
"uniform sampler2DRect rectTexture;"
|
||||
"vec4 tex_load(const vec2 coord)"
|
||||
"{"
|
||||
" return texture2DRect (rectTexture, gl_TexCoord[0].st + coord * 2.0);"
|
||||
"}"
|
||||
""
|
||||
"void main()"
|
||||
"{"
|
||||
" vec4 color;"
|
||||
" float count = 1.0;"
|
||||
""
|
||||
" color = texture2DRect (rectTexture, gl_TexCoord[0].st);"
|
||||
" color += tex_load (vec2 (-1.0, -1.0)); count++;"
|
||||
" color += tex_load (vec2 (-1.0, 0.0)); count++;"
|
||||
" color += tex_load (vec2 (-1.0, 1.0)); count++;"
|
||||
" color += tex_load (vec2 ( 0.0, -1.0)); count++;"
|
||||
" color += tex_load (vec2 ( 0.0, 0.0)); count++;"
|
||||
" color += tex_load (vec2 ( 0.0, 1.0)); count++;"
|
||||
" color += tex_load (vec2 ( 1.0, -1.0)); count++;"
|
||||
" color += tex_load (vec2 ( 1.0, 0.0)); count++;"
|
||||
" color += tex_load (vec2 ( 1.0, 1.0)); count++;"
|
||||
""
|
||||
" gl_FragColor = color / count;"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}"
|
||||
"vec4 get_rgba_rel(sampler2DRect tex, float dx, float dy)"
|
||||
"{"
|
||||
" return texture2DRect (tex, gl_TexCoord[0].st + vec2(dx,dy) * 2.0);"
|
||||
"}"
|
||||
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" float count = 1.0;"
|
||||
" color += get_rgba_rel (tex, -1.0, -1.0); count++;"
|
||||
" color += get_rgba_rel (tex, -1.0, 0.0); count++;"
|
||||
" color += get_rgba_rel (tex, -1.0, 1.0); count++;"
|
||||
" color += get_rgba_rel (tex, 0.0, -1.0); count++;"
|
||||
" color += get_rgba_rel (tex, 0.0, 0.0); count++;"
|
||||
" color += get_rgba_rel (tex, 0.0, 1.0); count++;"
|
||||
" color += get_rgba_rel (tex, 1.0, -1.0); count++;"
|
||||
" color += get_rgba_rel (tex, 1.0, 0.0); count++;"
|
||||
" color += get_rgba_rel (tex, 1.0, 1.0); count++;"
|
||||
" color = color / count;"
|
||||
FRAGMENT_SHADER_END
|
||||
#endif
|
||||
},
|
||||
|
||||
{"invert",
|
||||
|
||||
"uniform sampler2DRect tex;\n"
|
||||
"void main ()\n"
|
||||
"{\n"
|
||||
" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));\n"
|
||||
" gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0) - color;\n"
|
||||
" gl_FragColor.a = color.a;\n"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}"
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" color.rgb = vec3(1.0, 1.0, 1.0) - color.rgb;\n"
|
||||
FRAGMENT_SHADER_END
|
||||
},
|
||||
|
||||
{"brightness-contrast",
|
||||
"uniform float brightness;"
|
||||
"uniform float contrast;"
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" color.r = (color.r - 0.5) * contrast + brightness + 0.5;"
|
||||
" color.g = (color.g - 0.5) * contrast + brightness + 0.5;"
|
||||
" color.b = (color.b - 0.5) * contrast + brightness + 0.5;"
|
||||
FRAGMENT_SHADER_END
|
||||
},
|
||||
|
||||
"uniform sampler2DRect tex;"
|
||||
"uniform float brightness;"
|
||||
"uniform float contrast;"
|
||||
"void main ()"
|
||||
"{"
|
||||
" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));"
|
||||
" color.r = (color.r - 0.5) * contrast + brightness + 0.5;"
|
||||
" color.g = (color.g - 0.5) * contrast + brightness + 0.5;"
|
||||
" color.b = (color.b - 0.5) * contrast + brightness + 0.5;"
|
||||
" gl_FragColor = color;"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}",
|
||||
},
|
||||
{"gray",
|
||||
"uniform sampler2DRect tex;"
|
||||
"void main ()"
|
||||
"{"
|
||||
" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));"
|
||||
" float avg = (color.r + color.g + color.b) / 3.0;"
|
||||
" color.r = avg;"
|
||||
" color.g = avg;"
|
||||
" color.b = avg;"
|
||||
" gl_FragColor = color;"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}",
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" float avg = (color.r + color.g + color.b) / 3.0;"
|
||||
" color.r = avg;"
|
||||
" color.g = avg;"
|
||||
" color.b = avg;"
|
||||
FRAGMENT_SHADER_END
|
||||
},
|
||||
|
||||
{"combined-mirror",
|
||||
"uniform sampler2DRect tex;"
|
||||
"void main ()"
|
||||
"{"
|
||||
" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));"
|
||||
" vec4 colorB = texture2DRect (tex, vec2(gl_TexCoord[0].ts));"
|
||||
" float avg = (color.r + color.g + color.b) / 3.0;"
|
||||
" color.r = avg;"
|
||||
" color.g = avg;"
|
||||
" color.b = avg;"
|
||||
" color = (color + colorB)/2.0;"
|
||||
" gl_FragColor = color;"
|
||||
" gl_FragColor = gl_FragColor * gl_Color;"
|
||||
"}",
|
||||
FRAGMENT_SHADER_BEGIN
|
||||
" vec4 colorB = texture2DRect (tex, vec2(gl_TexCoord[0].ts));"
|
||||
" float avg = (color.r + color.g + color.b) / 3.0;"
|
||||
" color.r = avg;"
|
||||
" color.g = avg;"
|
||||
" color.b = avg;"
|
||||
" color = (color + colorB)/2.0;"
|
||||
FRAGMENT_SHADER_END
|
||||
},
|
||||
/* Terminating NULL sentinel */
|
||||
{NULL, NULL}
|
||||
};
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user