quakeforge/libs/video/renderer/glsl/quake2d.frag

//precision mediump float;
uniform sampler2D   texture;
uniform sampler2D   palette;
varying vec4 color;
varying vec2 st;

void
main (void)
{
	float       pix;

	pix = texture2D (texture, st).r;
	if (pix == 1.0)
		discard;
	gl_FragColor = texture2D (palette, vec2 (pix, 0.0)) * color;
}
Start work on outputting text. The shaders now compile. No linking is done yet. Char quads are generated, but not sent to the card. 2011-12-25 10:42:39 +00:00			`//precision mediump float;`
Organize the text program data. Also, rename the charmap uniform in quake2d.frag as it's more generic than that. 2011-12-26 08:42:23 +00:00			`uniform sampler2D texture;`
Create some shaders for quake text. Still nothing drawn, but this gets my shader scripts into C without me having to look at ugly strings. 2011-12-25 06:53:12 +00:00			`uniform sampler2D palette;`
Add support for vertex colors. As I need to control the alpha, they're sent as rgba rather than quake palette indices. Text works well. All other 2d stuff does not :(. 2011-12-28 00:04:26 +00:00			`varying vec4 color;`
Start work on outputting text. The shaders now compile. No linking is done yet. Char quads are generated, but not sent to the card. 2011-12-25 10:42:39 +00:00			`varying vec2 st;`
Create some shaders for quake text. Still nothing drawn, but this gets my shader scripts into C without me having to look at ugly strings. 2011-12-25 06:53:12 +00:00
			`void`
			`main (void)`
			`{`
Start work on outputting text. The shaders now compile. No linking is done yet. Char quads are generated, but not sent to the card. 2011-12-25 10:42:39 +00:00			`float pix;`
Create some shaders for quake text. Still nothing drawn, but this gets my shader scripts into C without me having to look at ugly strings. 2011-12-25 06:53:12 +00:00
Organize the text program data. Also, rename the charmap uniform in quake2d.frag as it's more generic than that. 2011-12-26 08:42:23 +00:00			`pix = texture2D (texture, st).r;`
Get text rendering working. It comes out as a funky green (that's not in the quake palette!!!), but it's mostly readable. 2011-12-26 01:16:16 +00:00			`if (pix == 1.0)`
			`discard;`
Use 0.0 instead of 0.5 for t for palette lookups. I realized it's pretty silly using colormap + palette when I can just combine the two into one and have a 2D palette. This is in preparation for that. 2012-01-14 11:51:43 +00:00			`gl_FragColor = texture2D (palette, vec2 (pix, 0.0)) * color;`
Create some shaders for quake text. Still nothing drawn, but this gets my shader scripts into C without me having to look at ugly strings. 2011-12-25 06:53:12 +00:00			`}`