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https://github.com/mkxp-z/mkxp-z.git
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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.
53 lines
2.2 KiB
C
53 lines
2.2 KiB
C
#include "tilemap.pgl.h"
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static const float tileW = 32.0;
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static const float tileH = 32.0;
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static const float autotileW = 3.0*tileW;
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static const float autotileH = 4.0*tileW;
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static const float atAreaW = autotileW;
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static const float atAreaH = autotileH*nAutotiles;
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static const float atAniOffsetX = 3.0*tileW;
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static const float atAniOffsetY = tileH;
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void mkxpTilemapVS(float *_output, pgl_vec4 *_attribs, Shader_Builtins *builtins, void *_uniforms)
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{
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struct TilemapVarying *output = (struct TilemapVarying *)_output;
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struct TilemapAttribs *attribs = (struct TilemapAttribs *)_attribs;
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struct TilemapUniforms *uniforms = (struct TilemapUniforms *)_uniforms;
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pgl_vec2 tex = attribs->texCoord;
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int atIndex = tex.y / autotileH;
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int pred = tex.x <= atAreaW && tex.y <= atAreaH;
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int frame = uniforms->aniIndex - uniforms->atFrames[atIndex] * (uniforms->aniIndex / uniforms->atFrames[atIndex]);
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int row = frame / 8;
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int col = frame - 8 * row;
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tex.x += atAniOffsetX * (float)(col * pred);
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tex.y += atAniOffsetY * (float)(row * pred);
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pgl_vec2 pos = add_vec2s(attribs->position, uniforms->translation);
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builtins->gl_Position = mult_mat4_vec4(uniforms->projMat, (pgl_vec4){pos.x, pos.y, 0, 1});
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output->v_texCoord = mult_vec2s(tex, uniforms->texSizeInv);
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}
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static const pgl_vec3 lumaF = {.299, .587, .114};
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void mkxpTilemapFS(float *_input, Shader_Builtins *builtins, void *_uniforms)
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{
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struct TilemapVarying *input = (struct TilemapVarying *)_input;
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struct TilemapUniforms *uniforms = (struct TilemapUniforms *)_uniforms;
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pgl_vec4 frag = mkxp_pgl_texture2D(uniforms->texture, input->v_texCoord.x, input->v_texCoord.y);
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float luma = dot_vec3s((pgl_vec3){frag.x, frag.y, frag.z}, lumaF);
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pgl_vec3 gray = pgl_mix_vec3((pgl_vec3){frag.x, frag.y, frag.z}, (pgl_vec3){luma, luma, luma}, uniforms->tone.w);
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frag.x = gray.x;
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frag.y = gray.y;
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frag.z = gray.z;
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frag.x += uniforms->tone.x;
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frag.y += uniforms->tone.y;
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frag.z += uniforms->tone.z;
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frag.w += uniforms->opacity;
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pgl_vec3 color = pgl_mix_vec3((pgl_vec3){frag.x, frag.y, frag.z}, (pgl_vec3){uniforms->color.x, uniforms->color.y, uniforms->color.z}, uniforms->color.w);
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frag.x = color.x;
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frag.y = color.y;
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frag.z = color.z;
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builtins->gl_FragColor = frag;
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}
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