mirror of
https://github.com/mkxp-z/mkxp-z.git
synced 2025-08-24 07:43:44 +02:00
2cd8202af3
PortableGL supports shaders, but requires them to be compiled ahead-of-time to C or C++. I'll write a compiler later to translate from GLSL to this format automatically at build time.
28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
#include "gray.pgl.h"
|
|
|
|
void mkxpGrayVS(float *_output, pgl_vec4 *_attribs, Shader_Builtins *builtins, void *_uniforms)
|
|
{
|
|
struct GrayVarying *output = (struct GrayVarying *)_output;
|
|
struct GrayAttribs *attribs = (struct GrayAttribs *)_attribs;
|
|
struct GrayUniforms *uniforms = (struct GrayUniforms *)_uniforms;
|
|
|
|
pgl_vec2 pos = add_vec2s(attribs->position, uniforms->translation);
|
|
builtins->gl_Position = mult_mat4_vec4(uniforms->projMat, (pgl_vec4){pos.x, pos.y, 0, 1});
|
|
output->v_texCoord = mult_vec2s(attribs->texCoord, uniforms->texSizeInv);
|
|
}
|
|
|
|
static const pgl_vec3 lumaF = {.299, .587, .114};
|
|
|
|
void mkxpGrayFS(float *_input, Shader_Builtins *builtins, void *_uniforms)
|
|
{
|
|
struct GrayVarying *input = (struct GrayVarying *)_input;
|
|
struct GrayUniforms *uniforms = (struct GrayUniforms *)_uniforms;
|
|
|
|
pgl_vec4 frag = mkxp_pgl_texture2D(uniforms->texture, input->v_texCoord.x, input->v_texCoord.y);
|
|
float luma = dot_vec3s((pgl_vec3){frag.x, frag.y, frag.z}, lumaF);
|
|
pgl_vec3 gray = pgl_mix_vec3((pgl_vec3){frag.x, frag.y, frag.z}, (pgl_vec3){luma, luma, luma}, uniforms->gray);
|
|
frag.x = gray.x;
|
|
frag.y = gray.y;
|
|
frag.z = gray.z;
|
|
builtins->gl_FragColor = frag;
|
|
}
|