38c9d46a0e
(cogl_gles2_wrapper_init): Get uniforms for fog parameters and
initialise them.
(cogl_wrap_glDrawArrays): Store the modelview matrix in a uniform
as well so that it can be used for fogging calculations.
(cogl_wrap_glEnable, cogl_wrap_glDisable): Enable/disable fogging.
(cogl_wrap_glFogx, cogl_wrap_glFogxv): Fill in wrapper to set
fogging parameters.
* clutter/cogl/gles/cogl-fixed-vertex-shader.glsl: Calculate the
fog amount if fogging is enabled.
* clutter/cogl/gles/cogl-fixed-fragment-shader.glsl: Mix with fog
color.
* clutter/cogl/gles/cogl-gles2-wrapper.h (CoglGles2Wrapper): Add
uniforms for fogging.
39 lines
996 B
GLSL
39 lines
996 B
GLSL
/* Inputs from the vertex shader */
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varying vec4 frag_color;
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varying vec2 tex_coord;
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varying float fog_amount;
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/* Texturing options */
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uniform bool texture_2d_enabled;
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uniform sampler2D texture_unit;
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uniform bool alpha_only;
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/* Fogging options */
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uniform bool fog_enabled;
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uniform vec4 fog_color;
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void
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main (void)
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{
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if (texture_2d_enabled)
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{
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if (alpha_only)
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{
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/* If the texture only has an alpha channel (eg, with the
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textures from the pango renderer) then the RGB components
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will be black. We want to use the RGB from the current
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color in that case */
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gl_FragColor = frag_color;
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gl_FragColor.a *= texture2D (texture_unit, tex_coord).a;
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}
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else
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gl_FragColor = frag_color * texture2D (texture_unit, tex_coord);
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}
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else
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gl_FragColor = frag_color;
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if (fog_enabled)
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/* Mix the calculated color with the fog color */
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gl_FragColor.rgb = mix (fog_color.rgb, gl_FragColor.rgb, fog_amount);
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}
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