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Softcode shaders

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This commit is contained in:
NepDisk 2026-04-28 20:52:47 -04:00
parent e6b1826d3e
commit af439ac09f
5 changed files with 98 additions and 505 deletions
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4
src/hardware/hw_glob.h
View file

@ -236,8 +236,8 @@ void HWR_CompileShaders(void);
int HWR_GetShaderFromTarget(int shader_target);
void HWR_LoadAllCustomShaders(void);
void HWR_LoadCustomShadersFromFile(UINT16 wadnum, boolean PK3);
void HWR_LoadAllBaseShaders(void);
void HWR_LoadCustomShadersFromFile(UINT16 wadnum, boolean PK3, boolean startup);
const char *HWR_GetShaderName(INT32 shader);
extern customshaderxlat_t shaderxlat[];

2
src/hardware/hw_main.c
View file

@ -1067,9 +1067,9 @@ void HWR_Startup(void)
HWR_InitMapTextures();
HWR_InitModels();
HWR_LoadAllBaseShaders();
gl_shadersavailable = HWR_InitShaders();
HWR_SetShaderState();
HWR_LoadAllCustomShaders();
HWR_TogglePaletteRendering();
}

160
src/hardware/hw_shaders.c
View file

@ -21,41 +21,9 @@
// ================
static struct {
const char *vertex;
const char *fragment;
} const gl_shadersources[] = {
// Floor shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_FLOOR_FRAGMENT_SHADER},
// Wall shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_WALL_FRAGMENT_SHADER},
// Sprite shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_WALL_FRAGMENT_SHADER},
// Model shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_WALL_FRAGMENT_SHADER},
// Model shader + diffuse lighting from above
{GLSL_MODEL_LIGHTING_VERTEX_SHADER, GLSL_SOFTWARE_MODEL_LIGHTING_FRAGMENT_SHADER},
// Water shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_WATER_FRAGMENT_SHADER},
// Fog shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_FOG_FRAGMENT_SHADER},
// Sky shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_SKY_FRAGMENT_SHADER},
// Palette postprocess shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_PALETTE_POSTPROCESS_FRAGMENT_SHADER},
// UI colormap fade shader
{GLSL_DEFAULT_VERTEX_SHADER, GLSL_UI_COLORMAP_FADE_FRAGMENT_SHADER},
{NULL, NULL},
};
char *vertex;
char *fragment;
} gl_baseshaders[NUMSHADERTARGETS];
typedef struct
{
@ -95,8 +63,28 @@ boolean HWR_InitShaders(void)
for (i = 0; i < NUMSHADERTARGETS; i++)
{
// set up string pointers for base shaders
gl_shaders[i].vertex = Z_StrDup(gl_shadersources[i].vertex);
gl_shaders[i].fragment = Z_StrDup(gl_shadersources[i].fragment);
if (gl_baseshaders[i].vertex)
{
gl_shaders[i].vertex = Z_StrDup(gl_baseshaders[i].vertex);
}
else
{
CONS_Alert(CONS_ERROR, "HWR_InitShaders: Could not load base vertex shader for%s\n", shaderxlat[i].type);
gl_shaders[i].vertex = Z_StrDup(GLSL_FALLBACK_VERTEX_SHADER);
}
if (gl_baseshaders[i].fragment)
{
gl_shaders[i].fragment = Z_StrDup(gl_baseshaders[i].fragment);
}
else
{
CONS_Alert(CONS_ERROR, "HWR_InitShaders: Could not load base fragment shader for%s\n", shaderxlat[i].type);
gl_shaders[i].fragment = Z_StrDup(GLSL_FALLBACK_FRAGMENT_SHADER);
}
// set shader target indices to correct values
gl_shadertargets[i].base_shader = i;
gl_shadertargets[i].custom_shader = -1;
@ -450,18 +438,18 @@ customshaderxlat_t shaderxlat[] =
{NULL, 0},
};
void HWR_LoadAllCustomShaders(void)
void HWR_LoadAllBaseShaders(void)
{
/*
INT32 i;
// read every custom shader
// read every base shader added by iwads.
for (i = 0; i < numwadfiles; i++)
HWR_LoadCustomShadersFromFile(i, (type == RET_PK3)));
*/
{
HWR_LoadCustomShadersFromFile(i, (wadfiles[i]->type == RET_PK3), true);
}
}
void HWR_LoadCustomShadersFromFile(UINT16 wadnum, boolean PK3)
void HWR_LoadCustomShadersFromFile(UINT16 wadnum, boolean PK3, boolean startup)
{
UINT16 lump;
char *shaderdef, *line;
@ -473,7 +461,7 @@ void HWR_LoadCustomShadersFromFile(UINT16 wadnum, boolean PK3)
int i;
boolean modified_shaders[NUMSHADERTARGETS] = {0};
if (!gl_shadersavailable)
if (!startup && !gl_shadersavailable)
return;
lump = HWR_FindShaderDefs(wadnum);
@ -570,7 +558,11 @@ skip_lump:
W_ReadLumpPwad(wadnum, shader_lumpnum, shader_source);
shader_source[shader_string_length-1] = '\0';
shader_index = shaderxlat[i].id + NUMSHADERTARGETS;
if (startup)
shader_index = shaderxlat[i].id;
else
shader_index = shaderxlat[i].id + NUMSHADERTARGETS;
if (!modified_shaders[shaderxlat[i].id])
{
// this will clear any old custom shaders from previously loaded files
@ -579,26 +571,59 @@ skip_lump:
gl_shaders[shader_index].vertex = NULL;
Z_Free(gl_shaders[shader_index].fragment);
gl_shaders[shader_index].fragment = NULL;
if (startup)
{
Z_Free(gl_baseshaders[shader_index].vertex);
gl_baseshaders[shader_index].vertex = NULL;
Z_Free(gl_baseshaders[shader_index].fragment);
gl_baseshaders[shader_index].fragment = NULL;
}
}
modified_shaders[shaderxlat[i].id] = true;
if (shadertype == 1)
{
if (gl_shaders[shader_index].vertex)
if (startup)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s vertex shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_shaders[shader_index].vertex);
if (gl_baseshaders[shader_index].vertex)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s vertex shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_baseshaders[shader_index].vertex);
}
gl_baseshaders[shader_index].vertex = Z_StrDup(shader_source);
}
else
{
if (gl_shaders[shader_index].vertex)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s vertex shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_shaders[shader_index].vertex);
}
gl_shaders[shader_index].vertex = shader_source;
}
gl_shaders[shader_index].vertex = shader_source;
}
else
{
if (gl_shaders[shader_index].fragment)
if (startup)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s fragment shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_shaders[shader_index].fragment);
if (gl_baseshaders[shader_index].fragment)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s fragment shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_baseshaders[shader_index].fragment);
}
gl_baseshaders[shader_index].fragment = Z_StrDup(shader_source);
}
else
{
if (gl_shaders[shader_index].fragment)
{
CONS_Alert(CONS_WARNING, "HWR_LoadCustomShadersFromFile: %s is overwriting another %s fragment shader from the same addon! (file %s, line %d)\n", shader_lumpname, shaderxlat[i].type, wadfiles[wadnum]->filename, linenum);
Z_Free(gl_shaders[shader_index].fragment);
}
gl_shaders[shader_index].fragment = shader_source;
}
gl_shaders[shader_index].fragment = shader_source;
}
Z_Free(shader_lumpname);
@ -611,21 +636,24 @@ skip_field:
}
}
for (i = 0; i < NUMSHADERTARGETS; i++)
if (!startup)
{
if (modified_shaders[i])
for (i = 0; i < NUMSHADERTARGETS; i++)
{
int shader_index = i + NUMSHADERTARGETS; // index to gl_shaders
gl_shadertargets[i].custom_shader = shader_index;
// if only one stage (vertex/fragment) is defined, the other one
// is copied from the base shaders.
if (!gl_shaders[shader_index].fragment)
gl_shaders[shader_index].fragment = Z_StrDup(gl_shadersources[i].fragment);
if (!gl_shaders[shader_index].vertex)
gl_shaders[shader_index].vertex = Z_StrDup(gl_shadersources[i].vertex);
HWR_CompileShader(shader_index);
if (!gl_shaders[shader_index].compiled)
CONS_Alert(CONS_ERROR, "HWR_LoadCustomShadersFromFile: A compilation error occured for the %s shader in file %s. See the console messages above for more information.\n", shaderxlat[i].type, wadfiles[wadnum]->filename);
if (modified_shaders[i])
{
int shader_index = i + NUMSHADERTARGETS; // index to gl_shaders
gl_shadertargets[i].custom_shader = shader_index;
// if only one stage (vertex/fragment) is defined, the other one
// is copied from the base shaders.
if (!gl_shaders[shader_index].fragment)
gl_shaders[shader_index].fragment = Z_StrDup(gl_baseshaders[i].fragment);
if (!gl_shaders[shader_index].vertex)
gl_shaders[shader_index].vertex = Z_StrDup(gl_baseshaders[i].vertex);
HWR_CompileShader(shader_index);
if (!gl_shaders[shader_index].compiled)
CONS_Alert(CONS_ERROR, "HWR_LoadCustomShadersFromFile: A compilation error occured for the %s shader in file %s. See the console messages above for more information.\n", shaderxlat[i].type, wadfiles[wadnum]->filename);
}
}
}

435
src/hardware/hw_shaders.h
View file

@ -22,430 +22,6 @@
// Generic vertex shader
//
#define GLSL_DEFAULT_VERTEX_SHADER \
"void main()\n" \
"{\n" \
"gl_Position = gl_ProjectionMatrix * gl_ModelViewMatrix * gl_Vertex;\n" \
"gl_FrontColor = gl_Color;\n" \
"gl_TexCoord[0].xy = gl_MultiTexCoord0.xy;\n" \
"gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;\n" \
"}\0"
// reinterpretation of sprite lighting for models
// it's a combination of how it works for normal sprites & papersprites
#define GLSL_MODEL_LIGHTING_VERTEX_SHADER \
"uniform float lighting;\n" \
"uniform vec3 light_dir;\n" \
"uniform float light_contrast;\n" \
"uniform float light_backlight;\n" \
"void main()\n" \
"{\n" \
"gl_Position = gl_ProjectionMatrix * gl_ModelViewMatrix * gl_Vertex;\n" \
"float light = lighting;\n" \
"if (length(light_dir) > 0.000001) {\n" \
"mat4 m4 = gl_ProjectionMatrix * gl_ModelViewMatrix;\n" \
"mat3 m3 = mat3( m4[0].xyz, m4[1].xyz, m4[2].xyz );\n" \
"float extralight = -dot(normalize(gl_Normal * m3), normalize(light_dir));\n" \
"extralight *= light_contrast - light_backlight;\n" \
"extralight *= lighting / 255.0;\n" \
"light += extralight * 2.5;\n" \
"}\n" \
"light = clamp(light / 255.0, 0.0, 1.0);\n" \
"gl_FrontColor = vec4(light, light, light, 1.0);\n" \
"gl_TexCoord[0].xy = gl_MultiTexCoord0.xy;\n" \
"gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;\n" \
"}\0"
// ==================
// Fragment shaders
// ==================
//
// Generic fragment shader
//
#define GLSL_DEFAULT_FRAGMENT_SHADER \
"uniform sampler2D tex;\n" \
"uniform vec4 poly_color;\n" \
"void main(void) {\n" \
"gl_FragColor = texture2D(tex, gl_TexCoord[0].st) * poly_color;\n" \
"}\0"
//
// Software fragment shader
//
// Include GLSL_FLOOR_FUDGES or GLSL_WALL_FUDGES or define the fudges in shaders that use this macro.
#define GLSL_DOOM_COLORMAP_DITHER \
"float baseValue = max(startmap * STARTMAP_FUDGE - scale * 0.5 * SCALE_FUDGE, cap);\n" \
"float endResolutionx = scr_resolution.x;\n" \
"float endResolutiony = scr_resolution.y;\n" \
"if (scr_resolution.x > 1280.0) {\n" \
"endResolutionx = scr_resolution.x * 0.5;\n" \
"}\n" \
"if (scr_resolution.y > 720.0) {\n" \
"endResolutiony = scr_resolution.y * 0.5;\n" \
"}\n" \
"float zFactor = clamp((z - 192.0) / (6144.0 - 192.0), 0.0, 1.0);\n" \
"int scaleFactor = int(mix(1.0, 8.0, zFactor));\n" \
"endResolutionx = endResolutionx * scaleFactor;\n" \
"endResolutiony = endResolutiony * scaleFactor;\n" \
"vec2 normalizedPosition = position * vec2(endResolutionx / scr_resolution.x, endResolutiony / scr_resolution.y);\n" \
"int x = int(mod(normalizedPosition.x, 4.0));\n" \
"int y = int(mod(normalizedPosition.y, 4.0));\n" \
"float bayerMatrix[4*4] = float[4*4](\n" \
"0.0, 8.0, 2.0, 10.0,\n" \
"12.0, 4.0, 14.0, 6.0,\n" \
"3.0, 11.0, 1.0, 9.0,\n" \
"15.0, 7.0, 13.0, 5.0\n" \
");\n" \
"#ifdef SRB2_PALETTE_RENDERING\n" \
"float threshold = (1.0 - pow(zFactor, 2.0)) * (bayerMatrix[y*4 + x] / 11.0);\n" \
"#else\n" \
"float threshold = (1.0 - pow(zFactor, 2.0)) * (bayerMatrix[y*4 + x] / 16.0);\n" \
"#endif\n" \
"return mix(baseValue + threshold - 0.5 / 16.0, baseValue, zFactor);\n"
#define GLSL_DOOM_COLORMAP_NODITHER \
"return max(startmap * STARTMAP_FUDGE - scale * 0.5 * SCALE_FUDGE, cap);\n" \
#define GLSL_DOOM_COLORMAP \
"uniform vec2 scr_resolution;\n" \
"float R_DoomColormap(float light, float z, vec2 position)\n" \
"{\n" \
"float lightnum = clamp(light / 17.0, 0.0, 15.0);\n" \
"float lightz = clamp(z / 16.0, 0.0, 127.0);\n" \
"float startmap = (15.0 - lightnum) * 4.0;\n" \
"float scale = 160.0 / (lightz + 1.0);\n" \
"float cap = (155.0 - light) * 0.26;\n" \
"#ifdef SRB2_LIGHT_DITHER\n" \
GLSL_DOOM_COLORMAP_DITHER \
"#else\n" \
GLSL_DOOM_COLORMAP_NODITHER \
"#endif\n" \
"}\n"
// lighting cap adjustment:
// first num (155.0), increase to make it start to go dark sooner
// second num (0.26), increase to make it go dark faster
#define GLSL_DOOM_LIGHT_EQUATION \
"float R_DoomLightingEquation(float light)\n" \
"{\n" \
"float z = gl_FragCoord.z / gl_FragCoord.w;\n" \
"float colormap = floor(R_DoomColormap(light, z, gl_FragCoord.xy)) + 0.5;\n" \
"return clamp(colormap, 0.0, 31.0) / 32.0;\n" \
"}\n"
#define GLSL_SOFTWARE_TINT_EQUATION \
"if (mix(tint_color.a, 0.0, brightmap_mix) > 0.0) {\n" \
"float color_bright = sqrt((base_color.r * base_color.r) + (base_color.g * base_color.g) + (base_color.b * base_color.b));\n" \
"float strength = sqrt(mix(9.0 * tint_color.a, 0.0, brightmap_mix));\n" \
"final_color.r = clamp((color_bright * (tint_color.r * strength)) + (base_color.r * (1.0 - strength)), 0.0, 1.0);\n" \
"final_color.g = clamp((color_bright * (tint_color.g * strength)) + (base_color.g * (1.0 - strength)), 0.0, 1.0);\n" \
"final_color.b = clamp((color_bright * (tint_color.b * strength)) + (base_color.b * (1.0 - strength)), 0.0, 1.0);\n" \
"}\n"
#define GLSL_SOFTWARE_FADE_EQUATION \
"float darkness = R_DoomLightingEquation(final_lighting);\n" \
"if (fade_start > 0.0 || fade_end < 31.0) {\n" \
"float fs = fade_start / 31.0;\n" \
"float fe = fade_end / 31.0;\n" \
"float fd = fe - fs;\n" \
"darkness = clamp((darkness - fs) * (1.0 / fd), 0.0, 1.0);\n" \
"}\n" \
"if (newfade)\n" \
"{\n" \
"float colorBrightness = sqrt((final_color.r * final_color.r) + (final_color.g * final_color.g) + (final_color.b * final_color.b));\n" \
"float fogBrightness = sqrt((fade_color.r * fade_color.r) + (fade_color.g * fade_color.g) + (fade_color.b * fade_color.b));\n" \
"float colorIntensity = 0.0;\n" \
"if (colorBrightness < fogBrightness) {\n" \
"colorIntensity = 1.0 - min(final_color.r, min(final_color.g, final_color.b));\n" \
"colorIntensity = abs(colorIntensity - (1.0 - max(fade_color.r, max(fade_color.g, fade_color.b))));\n" \
"} else {\n" \
"colorIntensity = max(final_color.r, max(final_color.g, final_color.b));\n" \
"colorIntensity = abs(colorIntensity - min(fade_color.r, min(fade_color.g, fade_color.b)));\n" \
"}\n" \
"colorIntensity *= darkness;\n" \
"colorIntensity *= fade_color.a * 10.0;\n" \
"if (abs(final_color.r - fade_color.r) <= colorIntensity) {\n" \
"final_color.r = fade_color.r;\n" \
"} else if (final_color.r < fade_color.r) {\n" \
"final_color.r += colorIntensity;\n" \
"} else {\n" \
"final_color.r -= colorIntensity;\n" \
"}\n" \
"if (abs(final_color.g - fade_color.g) <= colorIntensity) {\n" \
"final_color.g = fade_color.g;\n" \
"} else if (final_color.g < fade_color.g) {\n" \
"final_color.g += colorIntensity;\n" \
"} else {\n" \
"final_color.g -= colorIntensity;\n" \
"}\n" \
"if (abs(final_color.b - fade_color.b) <= colorIntensity) {\n" \
"final_color.b = fade_color.b;\n" \
"} else if (final_color.b < fade_color.b) {\n" \
"final_color.b += colorIntensity;\n" \
"} else {\n" \
"final_color.b -= colorIntensity;\n" \
"}\n" \
"} else {\n" \
"final_color = mix(final_color, fade_color, darkness);\n" \
"}\n"
#define GLSL_PALETTE_RENDERING \
"float tex_pal_idx = texture3D(palette_lookup_tex, vec3((texel * 63.0 + 0.5) / 64.0))[0] * 255.0;\n" \
"float z = gl_FragCoord.z / gl_FragCoord.w;\n" \
"float light_y = clamp(floor(R_DoomColormap(final_lighting, z, gl_FragCoord.xy)), 0.0, 31.0);\n" \
"vec2 lighttable_coord = vec2((tex_pal_idx + 0.5) / 256.0, (light_y + 0.5) / 32.0);\n" \
"vec4 final_color = texture2D(lighttable_tex, lighttable_coord);\n" \
"final_color.a = texel.a * poly_color.a;\n" \
"gl_FragColor = final_color;\n" \
#define GLSL_SOFTWARE_FRAGMENT_SHADER \
"#ifdef SRB2_PALETTE_RENDERING\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform vec4 poly_color;\n" \
"uniform float lighting;\n" \
"uniform sampler3D palette_lookup_tex;\n" \
"uniform sampler2D lighttable_tex;\n" \
GLSL_DOOM_COLORMAP \
"void main(void) {\n" \
"vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - lighting) * brightmap_mix;\n" \
"float final_lighting = lighting + light_gain;\n" \
GLSL_PALETTE_RENDERING \
"}\n" \
"#else\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform vec4 poly_color;\n" \
"uniform vec4 tint_color;\n" \
"uniform vec4 fade_color;\n" \
"uniform float lighting;\n" \
"uniform float fade_start;\n" \
"uniform float fade_end;\n" \
"uniform bool newfade;\n" \
GLSL_DOOM_COLORMAP \
GLSL_DOOM_LIGHT_EQUATION \
"void main(void) {\n" \
"vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"vec4 base_color = texel * poly_color;\n" \
"vec4 final_color = base_color;\n" \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - lighting) * brightmap_mix;\n" \
"float final_lighting = lighting + light_gain;\n" \
GLSL_SOFTWARE_TINT_EQUATION \
GLSL_SOFTWARE_FADE_EQUATION \
"final_color.a = texel.a * poly_color.a;\n" \
"gl_FragColor = final_color;\n" \
"}\n" \
"#endif\0"
// hand tuned adjustments for light level calculation
#define GLSL_FLOOR_FUDGES \
"#define STARTMAP_FUDGE 1.06\n" \
"#define SCALE_FUDGE 1.15\n"
#define GLSL_WALL_FUDGES \
"#define STARTMAP_FUDGE 1.05\n" \
"#define SCALE_FUDGE 2.2\n"
#define GLSL_FLOOR_FRAGMENT_SHADER \
"#version 120\n" \
GLSL_FLOOR_FUDGES \
GLSL_SOFTWARE_FRAGMENT_SHADER
#define GLSL_WALL_FRAGMENT_SHADER \
"#version 120\n" \
GLSL_WALL_FUDGES \
GLSL_SOFTWARE_FRAGMENT_SHADER
// same as above but multiplies results with the lighting value from the
// accompanying vertex shader (stored in gl_Color)
#define GLSL_SOFTWARE_MODEL_LIGHTING_FRAGMENT_SHADER \
GLSL_WALL_FUDGES \
"#ifdef SRB2_PALETTE_RENDERING\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform sampler3D palette_lookup_tex;\n" \
"uniform sampler2D lighttable_tex;\n" \
"uniform vec4 poly_color;\n" \
"uniform float lighting;\n" \
GLSL_DOOM_COLORMAP \
"void main(void) {\n" \
" vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"#ifdef SRB2_MODEL_LIGHTING\n" \
"texel *= gl_Color;\n" \
"#endif\n" \
"float final_lighting = gl_Color.r * 255.0;\n" \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - final_lighting) * brightmap_mix;\n" \
"final_lighting += light_gain;\n" \
GLSL_PALETTE_RENDERING \
"}\n" \
"#else\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform vec4 poly_color;\n" \
"uniform vec4 tint_color;\n" \
"uniform vec4 fade_color;\n" \
"uniform float fade_start;\n" \
"uniform float fade_end;\n" \
"uniform bool newfade;\n" \
GLSL_DOOM_COLORMAP \
GLSL_DOOM_LIGHT_EQUATION \
"void main(void) {\n" \
"vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"vec4 base_color = texel * poly_color;\n" \
"vec4 final_color = base_color;\n" \
"float final_lighting = gl_Color.r * 255.0;\n" \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - final_lighting) * brightmap_mix;\n" \
"final_lighting += light_gain;\n" \
GLSL_SOFTWARE_TINT_EQUATION \
GLSL_SOFTWARE_FADE_EQUATION \
"final_color.a = texel.a * poly_color.a;\n" \
"gl_FragColor = final_color;\n" \
"}\n" \
"#endif\0"
//
// Water surface shader
//
// Mostly guesstimated, rather than the rest being built off Software science.
// Still needs to distort things underneath/around the water...
//
#define GLSL_WATER_TEXEL \
"float water_z = (gl_FragCoord.z / gl_FragCoord.w) / 2.0;\n" \
"float a = -pi * (water_z * freq) + (leveltime * speed);\n" \
"float sdistort = sin(a) * amp * 1.5;\n" \
"float cdistort = cos(a) * amp * 2.2;\n" \
"vec4 texel = texture2D(tex, vec2(gl_TexCoord[0].s - sdistort, gl_TexCoord[0].t - cdistort));\n"
#define GLSL_WATER_FRAGMENT_SHADER \
"#version 120\n" \
GLSL_FLOOR_FUDGES \
"const float freq = 0.03;\n" \
"const float amp = 0.025;\n" \
"const float speed = 1.6;\n" \
"const float pi = 3.14159;\n" \
"#ifdef SRB2_PALETTE_RENDERING\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform sampler3D palette_lookup_tex;\n" \
"uniform sampler2D lighttable_tex;\n" \
"uniform vec4 poly_color;\n" \
"uniform float lighting;\n" \
"uniform float leveltime;\n" \
GLSL_DOOM_COLORMAP \
"void main(void) {\n" \
GLSL_WATER_TEXEL \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - lighting) * brightmap_mix;\n" \
"float final_lighting = lighting + light_gain;\n" \
GLSL_PALETTE_RENDERING \
"}\n" \
"#else\n" \
"uniform sampler2D tex;\n" \
"uniform sampler2D brightmap;\n" \
"uniform vec4 poly_color;\n" \
"uniform vec4 tint_color;\n" \
"uniform vec4 fade_color;\n" \
"uniform float lighting;\n" \
"uniform float fade_start;\n" \
"uniform float fade_end;\n" \
"uniform bool newfade;\n" \
"uniform float leveltime;\n" \
GLSL_DOOM_COLORMAP \
GLSL_DOOM_LIGHT_EQUATION \
"void main(void) {\n" \
GLSL_WATER_TEXEL \
"vec4 base_color = texel * poly_color;\n" \
"vec4 final_color = base_color;\n" \
"float brightmap_mix = floor(texture2D(brightmap, gl_TexCoord[0].st).r);\n" \
"float light_gain = (255.0 - lighting) * brightmap_mix;\n" \
"float final_lighting = lighting + light_gain;\n" \
GLSL_SOFTWARE_TINT_EQUATION \
GLSL_SOFTWARE_FADE_EQUATION \
"final_color.a = texel.a * poly_color.a;\n" \
"gl_FragColor = final_color;\n" \
"}\n" \
"#endif\0"
//
// Fog block shader
//
// Alpha of the planes themselves are still slightly off -- see HWR_FogBlockAlpha
//
// The floor fudges are used, but should the wall fudges be used instead? or something inbetween?
// or separate values for floors and walls? (need to change more than this shader for that)
#define GLSL_FOG_FRAGMENT_SHADER \
"#version 120\n" \
GLSL_FLOOR_FUDGES \
"uniform vec4 tint_color;\n" \
"uniform vec4 fade_color;\n" \
"uniform float lighting;\n" \
"uniform float fade_start;\n" \
"uniform float fade_end;\n" \
"uniform bool newfade;\n" \
GLSL_DOOM_COLORMAP \
GLSL_DOOM_LIGHT_EQUATION \
"void main(void) {\n" \
"vec4 base_color = gl_Color;\n" \
"vec4 final_color = base_color;\n" \
"float brightmap_mix = 0.0;\n" \
"float light_gain = 0.0;\n" \
"float final_lighting = lighting + light_gain;\n" \
GLSL_SOFTWARE_TINT_EQUATION \
GLSL_SOFTWARE_FADE_EQUATION \
"gl_FragColor = final_color;\n" \
"}\0"
//
// Sky fragment shader
// Modulates poly_color with gl_Color
//
#define GLSL_SKY_FRAGMENT_SHADER \
"uniform sampler2D tex;\n" \
"uniform vec4 poly_color;\n" \
"void main(void) {\n" \
"gl_FragColor = texture2D(tex, gl_TexCoord[0].st) * gl_Color * poly_color;\n" \
"}\0"
// Shader for the palette rendering postprocess step
#define GLSL_PALETTE_POSTPROCESS_FRAGMENT_SHADER \
"uniform sampler2D tex;\n" \
"uniform sampler3D palette_lookup_tex;\n" \
"uniform sampler1D palette_tex;\n" \
"void main(void) {\n" \
"vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"float tex_pal_idx = texture3D(palette_lookup_tex, vec3((texel * 63.0 + 0.5) / 64.0))[0] * 255.0;\n" \
"float palette_coord = (tex_pal_idx + 0.5) / 256.0;\n" \
"vec4 final_color = texture1D(palette_tex, palette_coord);\n" \
"gl_FragColor = final_color;\n" \
"}\0"
// Applies a palettized colormap fade to tex
#define GLSL_UI_COLORMAP_FADE_FRAGMENT_SHADER \
"uniform sampler2D tex;\n" \
"uniform float lighting;\n" \
"uniform sampler3D palette_lookup_tex;\n" \
"uniform sampler2D lighttable_tex;\n" \
"void main(void) {\n" \
"vec4 texel = texture2D(tex, gl_TexCoord[0].st);\n" \
"float tex_pal_idx = texture3D(palette_lookup_tex, vec3((texel * 63.0 + 0.5) / 64.0))[0] * 255.0;\n" \
"vec2 lighttable_coord = vec2((tex_pal_idx + 0.5) / 256.0, (lighting + 0.5) / 32.0);\n" \
"gl_FragColor = texture2D(lighttable_tex, lighttable_coord);\n" \
"}\0"
//
// Generic vertex shader
//
#define GLSL_FALLBACK_VERTEX_SHADER \
"void main()\n" \
"{\n" \
@ -466,15 +42,4 @@
"gl_FragColor = texture2D(tex, gl_TexCoord[0].st) * poly_color;\n" \
"}\0"
//
// Sky fragment shader
// Modulates poly_color with gl_Color
//
#define GLSL_SKY_FRAGMENT_SHADER \
"uniform sampler2D tex;\n" \
"uniform vec4 poly_color;\n" \
"void main(void) {\n" \
"gl_FragColor = texture2D(tex, gl_TexCoord[0].st) * gl_Color * poly_color;\n" \
"}\0"
#endif

2
src/w_wad.c
View file

@ -1076,7 +1076,7 @@ UINT16 W_InitFile(const char *filename, boolean mainfile, boolean startup, boole
#ifdef HWRENDER
// Read shaders from file
if (rendermode == render_opengl && (vid.glstate == VID_GL_LIBRARY_LOADED))
HWR_LoadCustomShadersFromFile(numwadfiles - 1, (type == RET_PK3));
HWR_LoadCustomShadersFromFile(numwadfiles - 1, (type == RET_PK3), false);
#endif // HWRENDER
// check if compatmode is needed