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annotate shaders/default.f.glsl @ 1406:5e4a2ea8219b

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Minor simplification of default fragment shader
author Michael Pavone <pavone@retrodev.com>
date Sat, 17 Jun 2017 17:43:47 -0700
parents ee19270495e8
children 957325c990d5
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1 #version 110
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2
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3 uniform sampler2D textures[2];
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4
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5 varying vec2 texcoord;
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6
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7 void main()
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8 {
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ee19270495e8 Force texture y-coordinate to middle of line in default shader. Substantially improves picture when linear texture filtering is used
Michael Pavone <pavone@retrodev.com>
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9 vec2 modifiedCoord = vec2(texcoord.x, (floor(texcoord.y * 512.0) + 0.5)/512.0);
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e97b80e3bd76 Support interlace mode with OpenGL backend
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10 gl_FragColor = mix(
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5e4a2ea8219b Minor simplification of default fragment shader
Michael Pavone <pavone@retrodev.com>
parents: 1405
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11 texture2D(textures[1], modifiedCoord),
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ee19270495e8 Force texture y-coordinate to middle of line in default shader. Substantially improves picture when linear texture filtering is used
Michael Pavone <pavone@retrodev.com>
parents: 1404
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12 texture2D(textures[0], modifiedCoord),
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5e4a2ea8219b Minor simplification of default fragment shader
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13 (sin(texcoord.y * 1024.0 * 3.14159265359) + 1.0) * 0.5
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14 );
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15 }