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graphics: Stop comparing matrices in GLSL, which doesn't work on iPhone5s

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This commit is contained in:
Hajime Hoshi 2016-06-23 00:25:31 +09:00
parent bae27e19d7
commit 24bb5b5ca8
1 changed files with 7 additions and 9 deletions
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16
internal/graphics/shader.go
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@ -58,15 +58,13 @@ varying highp vec2 vertex_out_tex_coord;
void main(void) {
lowp vec4 color = texture2D(texture, vertex_out_tex_coord);
if (color_matrix != mat4(1.0) || color_matrix_translation != vec4(0.0)) {
// Un-premultiply alpha
color.rgb /= color.a;
// Apply the color matrix
color = (color_matrix * color) + color_matrix_translation;
color = clamp(color, 0.0, 1.0);
// Premultiply alpha
color.rgb *= color.a;
}
// Un-premultiply alpha
color.rgb /= color.a;
// Apply the color matrix
color = (color_matrix * color) + color_matrix_translation;
color = clamp(color, 0.0, 1.0);
// Premultiply alpha
color.rgb *= color.a;
gl_FragColor = color;
}