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RetroArch/gfx/shader_cg.c
Themaister 1e9e703375 Add support for CGP/GLSL. 
Serves to unify shader support across the board
on platforms which cannot use Cg (EGL, GLES).
Spec is exactly the same as CGP except that extension is
.glslp. Expected extension on individual shaders are .glsl.
2013-04-10 22:38:45 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef _MSC_VER
#pragma comment(lib, "cg")
#pragma comment(lib, "cggl")
#endif
#include "shader_cg.h"
#include <Cg/cg.h>
#include <Cg/cgGL.h>
#include "../general.h"
#include <string.h>
#include "../compat/strl.h"
#include "../conf/config_file.h"
#include "image.h"
#include "../dynamic.h"
#include "../compat/posix_string.h"
#include "../file.h"
#include "state_tracker.h"
//#define RARCH_CG_DEBUG
// Used when we call deactivate() since just unbinding the program didn't seem to work... :(
static const char *stock_cg_program =
"void main_vertex"
"("
" float4 position : POSITION,"
" float2 texCoord : TEXCOORD0,"
" float4 color : COLOR,"
""
" uniform float4x4 modelViewProj,"
""
" out float4 oPosition : POSITION,"
" out float2 otexCoord : TEXCOORD0,"
" out float4 oColor : COLOR"
")"
"{"
" oPosition = mul(modelViewProj, position);"
" otexCoord = texCoord;"
" oColor = color;"
"}"
""
"float4 main_fragment(in float4 color : COLOR, float2 tex : TEXCOORD0, uniform sampler2D s0 : TEXUNIT0) : COLOR"
"{"
" return color * tex2D(s0, tex);"
"}";
#ifdef RARCH_CG_DEBUG
static void cg_error_handler(CGcontext ctx, CGerror error, void *data)
{
(void)ctx;
(void)data;
switch (error)
{
case CG_INVALID_PARAM_HANDLE_ERROR:
RARCH_ERR("CG: Invalid param handle.\n");
break;
case CG_INVALID_PARAMETER_ERROR:
RARCH_ERR("CG: Invalid parameter.\n");
break;
default:
break;
}
RARCH_ERR("CG error: \"%s\"\n", cgGetErrorString(error));
}
#endif
static CGcontext cgCtx;
struct cg_fbo_params
{
CGparameter vid_size_f;
CGparameter tex_size_f;
CGparameter vid_size_v;
CGparameter tex_size_v;
CGparameter tex;
CGparameter coord;
};
#define MAX_TEXTURES 8
#define MAX_VARIABLES 64
#define PREV_TEXTURES 7
struct cg_program
{
CGprogram vprg;
CGprogram fprg;
CGparameter tex;
CGparameter lut_tex;
CGparameter color;
CGparameter vertex;
CGparameter vid_size_f;
CGparameter tex_size_f;
CGparameter out_size_f;
CGparameter frame_cnt_f;
CGparameter frame_dir_f;
CGparameter vid_size_v;
CGparameter tex_size_v;
CGparameter out_size_v;
CGparameter frame_cnt_v;
CGparameter frame_dir_v;
CGparameter mvp;
struct cg_fbo_params fbo[RARCH_CG_MAX_SHADERS];
struct cg_fbo_params orig;
struct cg_fbo_params prev[PREV_TEXTURES];
};
static struct cg_program prg[RARCH_CG_MAX_SHADERS];
static const char **cg_arguments;
static bool cg_active;
static CGprofile cgVProf, cgFProf;
static unsigned active_index;
static struct gfx_shader *cg_shader;
static state_tracker_t *state_tracker;
static GLuint lut_textures[MAX_TEXTURES];
static CGparameter cg_attribs[PREV_TEXTURES + 1 + 4 + RARCH_CG_MAX_SHADERS];
static unsigned cg_attrib_index;
static void gl_cg_reset_attrib(void)
{
for (unsigned i = 0; i < cg_attrib_index; i++)
cgGLDisableClientState(cg_attribs[i]);
cg_attrib_index = 0;
}
bool gl_cg_set_mvp(const math_matrix *mat)
{
if (cg_active && prg[active_index].mvp)
{
cgGLSetMatrixParameterfc(prg[active_index].mvp, mat->data);
return true;
}
else
return false;
}
#define SET_COORD(name, coords_name, len) do { \
if (prg[active_index].name) \
{ \
cgGLSetParameterPointer(prg[active_index].name, len, GL_FLOAT, 0, coords->coords_name); \
cgGLEnableClientState(prg[active_index].name); \
cg_attribs[cg_attrib_index++] = prg[active_index].name; \
} \
} while(0)
bool gl_cg_set_coords(const struct gl_coords *coords)
{
if (!cg_active)
return false;
SET_COORD(vertex, vertex, 2);
SET_COORD(tex, tex_coord, 2);
SET_COORD(lut_tex, lut_tex_coord, 2);
SET_COORD(color, color, 4);
return true;
}
#define set_param_2f(param, x, y) \
if (param) cgGLSetParameter2f(param, x, y)
#define set_param_1f(param, x) \
if (param) cgGLSetParameter1f(param, x)
void gl_cg_set_params(unsigned width, unsigned height,
unsigned tex_width, unsigned tex_height,
unsigned out_width, unsigned out_height,
unsigned frame_count,
const struct gl_tex_info *info,
const struct gl_tex_info *prev_info,
const struct gl_tex_info *fbo_info,
unsigned fbo_info_cnt)
{
if (!cg_active || (active_index == 0))
return;
// Set frame.
set_param_2f(prg[active_index].vid_size_f, width, height);
set_param_2f(prg[active_index].tex_size_f, tex_width, tex_height);
set_param_2f(prg[active_index].out_size_f, out_width, out_height);
set_param_1f(prg[active_index].frame_dir_f, g_extern.frame_is_reverse ? -1.0 : 1.0);
set_param_2f(prg[active_index].vid_size_v, width, height);
set_param_2f(prg[active_index].tex_size_v, tex_width, tex_height);
set_param_2f(prg[active_index].out_size_v, out_width, out_height);
set_param_1f(prg[active_index].frame_dir_v, g_extern.frame_is_reverse ? -1.0 : 1.0);
if (prg[active_index].frame_cnt_f || prg[active_index].frame_cnt_v)
{
unsigned modulo = cg_shader->pass[active_index - 1].frame_count_mod;
if (modulo)
frame_count %= modulo;
set_param_1f(prg[active_index].frame_cnt_f, (float)frame_count);
set_param_1f(prg[active_index].frame_cnt_v, (float)frame_count);
}
// Set orig texture.
CGparameter param = prg[active_index].orig.tex;
if (param)
{
cgGLSetTextureParameter(param, info->tex);
cgGLEnableTextureParameter(param);
}
set_param_2f(prg[active_index].orig.vid_size_v, info->input_size[0], info->input_size[1]);
set_param_2f(prg[active_index].orig.vid_size_f, info->input_size[0], info->input_size[1]);
set_param_2f(prg[active_index].orig.tex_size_v, info->tex_size[0], info->tex_size[1]);
set_param_2f(prg[active_index].orig.tex_size_f, info->tex_size[0], info->tex_size[1]);
if (prg[active_index].orig.coord)
{
cgGLSetParameterPointer(prg[active_index].orig.coord, 2, GL_FLOAT, 0, info->coord);
cgGLEnableClientState(prg[active_index].orig.coord);
cg_attribs[cg_attrib_index++] = prg[active_index].orig.coord;
}
// Set prev textures.
for (unsigned i = 0; i < PREV_TEXTURES; i++)
{
param = prg[active_index].prev[i].tex;
if (param)
{
cgGLSetTextureParameter(param, prev_info[i].tex);
cgGLEnableTextureParameter(param);
}
set_param_2f(prg[active_index].prev[i].vid_size_v, prev_info[i].input_size[0], prev_info[i].input_size[1]);
set_param_2f(prg[active_index].prev[i].vid_size_f, prev_info[i].input_size[0], prev_info[i].input_size[1]);
set_param_2f(prg[active_index].prev[i].tex_size_v, prev_info[i].tex_size[0], prev_info[i].tex_size[1]);
set_param_2f(prg[active_index].prev[i].tex_size_f, prev_info[i].tex_size[0], prev_info[i].tex_size[1]);
if (prg[active_index].prev[i].coord)
{
cgGLSetParameterPointer(prg[active_index].prev[i].coord, 2, GL_FLOAT, 0, prev_info[i].coord);
cgGLEnableClientState(prg[active_index].prev[i].coord);
cg_attribs[cg_attrib_index++] = prg[active_index].prev[i].coord;
}
}
// Set lookup textures.
for (unsigned i = 0; i < cg_shader->luts; i++)
{
CGparameter param = cgGetNamedParameter(prg[active_index].fprg, cg_shader->lut[i].id);
if (param)
{
cgGLSetTextureParameter(param, lut_textures[i]);
cgGLEnableTextureParameter(param);
}
}
// Set FBO textures.
if (active_index > 2)
{
for (unsigned i = 0; i < fbo_info_cnt; i++)
{
if (prg[active_index].fbo[i].tex)
{
cgGLSetTextureParameter(prg[active_index].fbo[i].tex, fbo_info[i].tex);
cgGLEnableTextureParameter(prg[active_index].fbo[i].tex);
}
set_param_2f(prg[active_index].fbo[i].vid_size_v, fbo_info[i].input_size[0], fbo_info[i].input_size[1]);
set_param_2f(prg[active_index].fbo[i].vid_size_f, fbo_info[i].input_size[0], fbo_info[i].input_size[1]);
set_param_2f(prg[active_index].fbo[i].tex_size_v, fbo_info[i].tex_size[0], fbo_info[i].tex_size[1]);
set_param_2f(prg[active_index].fbo[i].tex_size_f, fbo_info[i].tex_size[0], fbo_info[i].tex_size[1]);
if (prg[active_index].fbo[i].coord)
{
cgGLSetParameterPointer(prg[active_index].fbo[i].coord, 2, GL_FLOAT, 0, fbo_info[i].coord);
cgGLEnableClientState(prg[active_index].fbo[i].coord);
cg_attribs[cg_attrib_index++] = prg[active_index].fbo[i].coord;
}
}
}
// Set state parameters
if (state_tracker)
{
// Only query uniforms in first pass.
static struct state_tracker_uniform info[MAX_VARIABLES];
static unsigned cnt = 0;
if (active_index == 1)
cnt = state_get_uniform(state_tracker, info, MAX_VARIABLES, frame_count);
for (unsigned i = 0; i < cnt; i++)
{
CGparameter param_v = cgGetNamedParameter(prg[active_index].vprg, info[i].id);
CGparameter param_f = cgGetNamedParameter(prg[active_index].fprg, info[i].id);
set_param_1f(param_v, info[i].value);
set_param_1f(param_f, info[i].value);
}
}
}
static void gl_cg_deinit_progs(void)
{
RARCH_LOG("CG: Destroying programs.\n");
cgGLUnbindProgram(cgFProf);
cgGLUnbindProgram(cgVProf);
// Programs may alias [0].
for (unsigned i = 1; i < RARCH_CG_MAX_SHADERS; i++)
{
if (prg[i].fprg && prg[i].fprg != prg[0].fprg)
cgDestroyProgram(prg[i].fprg);
if (prg[i].vprg && prg[i].vprg != prg[0].vprg)
cgDestroyProgram(prg[i].vprg);
}
if (prg[0].fprg)
cgDestroyProgram(prg[0].fprg);
if (prg[0].vprg)
cgDestroyProgram(prg[0].vprg);
memset(prg, 0, sizeof(prg));
}
static void gl_cg_deinit_state(void)
{
gl_cg_reset_attrib();
cg_active = false;
gl_cg_deinit_progs();
if (cg_shader && cg_shader->luts)
{
glDeleteTextures(cg_shader->luts, lut_textures);
memset(lut_textures, 0, sizeof(lut_textures));
}
if (state_tracker)
{
state_tracker_free(state_tracker);
state_tracker = NULL;
}
free(cg_shader);
cg_shader = NULL;
}
// Final deinit.
static void gl_cg_deinit_context_state(void)
{
// Destroying context breaks on PS3 for some unknown reason.
#ifndef __CELLOS_LV2__
if (cgCtx)
{
RARCH_LOG("CG: Destroying context.\n");
cgDestroyContext(cgCtx);
cgCtx = NULL;
}
#endif
}
// Full deinit.
void gl_cg_deinit(void)
{
if (!cg_active)
return;
gl_cg_deinit_state();
gl_cg_deinit_context_state();
}
// Deinit as much as possible without resetting context (broken on PS3),
// and reinit cleanly.
// If this fails, we're kinda screwed without resetting everything on PS3.
bool gl_cg_reinit(const char *path)
{
if (cg_active)
gl_cg_deinit_state();
return gl_cg_init(path);
}
#define SET_LISTING(type) \
{ \
const char *list = cgGetLastListing(cgCtx); \
if (list) \
listing_##type = strdup(list); \
}
static bool load_program(unsigned index, const char *prog, bool path_is_file)
{
bool ret = true;
char *listing_f = NULL;
char *listing_v = NULL;
if (path_is_file)
{
prg[index].fprg = cgCreateProgramFromFile(cgCtx, CG_SOURCE, prog, cgFProf, "main_fragment", cg_arguments);
SET_LISTING(f);
prg[index].vprg = cgCreateProgramFromFile(cgCtx, CG_SOURCE, prog, cgVProf, "main_vertex", cg_arguments);
SET_LISTING(v);
}
else
{
prg[index].fprg = cgCreateProgram(cgCtx, CG_SOURCE, prog, cgFProf, "main_fragment", cg_arguments);
SET_LISTING(f);
prg[index].vprg = cgCreateProgram(cgCtx, CG_SOURCE, prog, cgVProf, "main_vertex", cg_arguments);
SET_LISTING(v);
}
if (!prg[index].fprg || !prg[index].vprg)
{
RARCH_ERR("CG error: %s\n", cgGetErrorString(cgGetError()));
if (listing_f)
RARCH_ERR("Fragment:\n%s\n", listing_f);
else if (listing_v)
RARCH_ERR("Vertex:\n%s\n", listing_v);
ret = false;
goto end;
}
cgGLLoadProgram(prg[index].fprg);
cgGLLoadProgram(prg[index].vprg);
end:
free(listing_f);
free(listing_v);
return ret;
}
static void set_program_base_attrib(unsigned i);
static bool load_stock(void)
{
if (!load_program(0, stock_cg_program, false))
{
RARCH_ERR("Failed to compile passthrough shader, is something wrong with your environment?\n");
return false;
}
set_program_base_attrib(0);
return true;
}
static bool load_plain(const char *path)
{
if (!load_stock())
return false;
cg_shader = (struct gfx_shader*)calloc(1, sizeof(*cg_shader));
if (!cg_shader)
return false;
cg_shader->passes = 1;
if (path)
{
RARCH_LOG("Loading Cg file: %s\n", path);
strlcpy(cg_shader->pass[0].source.cg, path, sizeof(cg_shader->pass[0].source.cg));
if (!load_program(1, path, true))
return false;
}
else
{
RARCH_LOG("Loading stock Cg file.\n");
prg[1] = prg[0];
}
return true;
}
#define print_buf(buf, ...) snprintf(buf, sizeof(buf), __VA_ARGS__)
#ifdef HAVE_OPENGLES2
#define BORDER_FUNC GL_CLAMP_TO_EDGE
#else
#define BORDER_FUNC GL_CLAMP_TO_BORDER
#endif
static void load_texture_data(GLuint obj, const struct texture_image *img, bool smooth)
{
glBindTexture(GL_TEXTURE_2D, obj);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, BORDER_FUNC);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, BORDER_FUNC);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, smooth ? GL_LINEAR : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, smooth ? GL_LINEAR : GL_NEAREST);
#ifndef HAVE_PSGL
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
#endif
glTexImage2D(GL_TEXTURE_2D,
0, driver.gfx_use_rgba ? GL_RGBA : RARCH_GL_INTERNAL_FORMAT32, img->width, img->height,
0, driver.gfx_use_rgba ? GL_RGBA : RARCH_GL_TEXTURE_TYPE32, RARCH_GL_FORMAT32, img->pixels);
free(img->pixels);
}
static bool load_textures(const char *cgp_path)
{
if (!cg_shader->luts)
return true;
glGenTextures(cg_shader->luts, lut_textures);
for (unsigned i = 0; i < cg_shader->luts; i++)
{
char image_path[PATH_MAX];
fill_pathname_resolve_relative(image_path, cgp_path,
cg_shader->lut[i].path, sizeof(image_path));
RARCH_LOG("Loading image from: \"%s\".\n", image_path);
struct texture_image img;
if (!texture_image_load(image_path, &img))
{
RARCH_ERR("Failed to load picture ...\n");
return false;
}
load_texture_data(lut_textures[i], &img,
cg_shader->lut[i].filter != RARCH_FILTER_NEAREST);
}
glBindTexture(GL_TEXTURE_2D, 0);
return true;
}
static bool load_imports(const char *cgp_path)
{
struct state_tracker_info tracker_info = {0};
for (unsigned i = 0; i < cg_shader->variables; i++)
{
unsigned memtype;
switch (cg_shader->variable[i].ram_type)
{
case RARCH_STATE_WRAM:
memtype = RETRO_MEMORY_SYSTEM_RAM;
break;
default:
memtype = -1u;
}
if ((memtype != -1u) && (cg_shader->variable[i].addr >= pretro_get_memory_size(memtype)))
{
RARCH_ERR("Address out of bounds.\n");
return false;
}
}
tracker_info.wram = (uint8_t*)pretro_get_memory_data(RETRO_MEMORY_SYSTEM_RAM);
tracker_info.info = cg_shader->variable;
tracker_info.info_elem = cg_shader->variables;
#ifdef HAVE_PYTHON
char script_path[PATH_MAX];
if (*cg_shader->script_path)
{
fill_pathname_resolve_relative(script_path, cgp_path,
cg_shader->script_path, sizeof(script_path));
tracker_info.script = script_path;
tracker_info.script_is_file = true;
}
tracker_info.script_class = *cg_shader->script_class ? cg_shader->script_class : NULL;
#endif
state_tracker = state_tracker_init(&tracker_info);
if (!state_tracker)
RARCH_WARN("Failed to initialize state tracker.\n");
return true;
}
static bool load_shader(const char *cgp_path, unsigned i)
{
char path_buf[PATH_MAX];
fill_pathname_resolve_relative(path_buf, cgp_path,
cg_shader->pass[i].source.cg, sizeof(path_buf));
RARCH_LOG("Loading Cg shader: \"%s\".\n", path_buf);
if (!load_program(i + 1, path_buf, true))
return false;
return true;
}
static bool load_preset(const char *path)
{
if (!load_stock())
return false;
RARCH_LOG("Loading Cg meta-shader: %s\n", path);
config_file_t *conf = config_file_new(path);
if (!conf)
{
RARCH_ERR("Failed to load preset.\n");
return false;
}
if (!cg_shader)
cg_shader = (struct gfx_shader*)calloc(1, sizeof(*cg_shader));
if (!cg_shader)
return false;
if (!gfx_shader_read_conf_cgp(conf, cg_shader))
{
RARCH_ERR("Failed to parse CGP file.\n");
config_file_free(conf);
return false;
}
config_file_free(conf);
#if 0 // Debugging
config_file_t *save_test = config_file_new(NULL);
gfx_shader_write_conf_cgp(conf, cg_shader);
config_file_write(save_test, "/tmp/load.cgp");
config_file_free(save_test);
#endif
if (cg_shader->passes > RARCH_CG_MAX_SHADERS - 3)
{
RARCH_WARN("Too many shaders ... Capping shader amount to %d.\n", RARCH_CG_MAX_SHADERS - 3);
cg_shader->passes = RARCH_CG_MAX_SHADERS - 3;
}
for (unsigned i = 0; i < cg_shader->passes; i++)
{
if (!load_shader(path, i))
{
RARCH_ERR("Failed to load shaders ...\n");
return false;
}
}
if (!load_textures(path))
{
RARCH_ERR("Failed to load lookup textures ...\n");
return false;
}
if (!load_imports(path))
{
RARCH_ERR("Failed to load imports ...\n");
return false;
}
return true;
}
static void set_program_base_attrib(unsigned i)
{
CGparameter param = cgGetFirstParameter(prg[i].vprg, CG_PROGRAM);
for (; param; param = cgGetNextParameter(param))
{
if (cgGetParameterDirection(param) != CG_IN || cgGetParameterVariability(param) != CG_VARYING)
continue;
const char *semantic = cgGetParameterSemantic(param);
if (!semantic)
continue;
RARCH_LOG("CG: Found semantic \"%s\" in prog #%u.\n", semantic, i);
if (strcmp(semantic, "TEXCOORD") == 0 || strcmp(semantic, "TEXCOORD0") == 0)
prg[i].tex = param;
else if (strcmp(semantic, "COLOR") == 0 || strcmp(semantic, "COLOR0") == 0)
prg[i].color = param;
else if (strcmp(semantic, "POSITION") == 0)
prg[i].vertex = param;
else if (strcmp(semantic, "TEXCOORD1") == 0)
prg[i].lut_tex = param;
}
}
static void set_program_attributes(unsigned i)
{
cgGLBindProgram(prg[i].fprg);
cgGLBindProgram(prg[i].vprg);
set_program_base_attrib(i);
prg[i].vid_size_f = cgGetNamedParameter(prg[i].fprg, "IN.video_size");
prg[i].tex_size_f = cgGetNamedParameter(prg[i].fprg, "IN.texture_size");
prg[i].out_size_f = cgGetNamedParameter(prg[i].fprg, "IN.output_size");
prg[i].frame_cnt_f = cgGetNamedParameter(prg[i].fprg, "IN.frame_count");
prg[i].frame_dir_f = cgGetNamedParameter(prg[i].fprg, "IN.frame_direction");
prg[i].vid_size_v = cgGetNamedParameter(prg[i].vprg, "IN.video_size");
prg[i].tex_size_v = cgGetNamedParameter(prg[i].vprg, "IN.texture_size");
prg[i].out_size_v = cgGetNamedParameter(prg[i].vprg, "IN.output_size");
prg[i].frame_cnt_v = cgGetNamedParameter(prg[i].vprg, "IN.frame_count");
prg[i].frame_dir_v = cgGetNamedParameter(prg[i].vprg, "IN.frame_direction");
prg[i].mvp = cgGetNamedParameter(prg[i].vprg, "modelViewProj");
prg[i].orig.tex = cgGetNamedParameter(prg[i].fprg, "ORIG.texture");
prg[i].orig.vid_size_v = cgGetNamedParameter(prg[i].vprg, "ORIG.video_size");
prg[i].orig.vid_size_f = cgGetNamedParameter(prg[i].fprg, "ORIG.video_size");
prg[i].orig.tex_size_v = cgGetNamedParameter(prg[i].vprg, "ORIG.texture_size");
prg[i].orig.tex_size_f = cgGetNamedParameter(prg[i].fprg, "ORIG.texture_size");
prg[i].orig.coord = cgGetNamedParameter(prg[i].vprg, "ORIG.tex_coord");
for (unsigned j = 0; j < PREV_TEXTURES; j++)
{
char attr_buf_tex[64];
char attr_buf_vid_size[64];
char attr_buf_tex_size[64];
char attr_buf_coord[64];
static const char *prev_names[PREV_TEXTURES] = {
"PREV",
"PREV1",
"PREV2",
"PREV3",
"PREV4",
"PREV5",
"PREV6",
};
snprintf(attr_buf_tex, sizeof(attr_buf_tex), "%s.texture", prev_names[j]);
snprintf(attr_buf_vid_size, sizeof(attr_buf_vid_size), "%s.video_size", prev_names[j]);
snprintf(attr_buf_tex_size, sizeof(attr_buf_tex_size), "%s.texture_size", prev_names[j]);
snprintf(attr_buf_coord, sizeof(attr_buf_coord), "%s.tex_coord", prev_names[j]);
prg[i].prev[j].tex = cgGetNamedParameter(prg[i].fprg, attr_buf_tex);
prg[i].prev[j].vid_size_v = cgGetNamedParameter(prg[i].vprg, attr_buf_vid_size);
prg[i].prev[j].vid_size_f = cgGetNamedParameter(prg[i].fprg, attr_buf_vid_size);
prg[i].prev[j].tex_size_v = cgGetNamedParameter(prg[i].vprg, attr_buf_tex_size);
prg[i].prev[j].tex_size_f = cgGetNamedParameter(prg[i].fprg, attr_buf_tex_size);
prg[i].prev[j].coord = cgGetNamedParameter(prg[i].vprg, attr_buf_coord);
}
for (unsigned j = 0; j < i - 1; j++)
{
char attr_buf[64];
snprintf(attr_buf, sizeof(attr_buf), "PASS%u.texture", j + 1);
prg[i].fbo[j].tex = cgGetNamedParameter(prg[i].fprg, attr_buf);
snprintf(attr_buf, sizeof(attr_buf), "PASS%u.video_size", j + 1);
prg[i].fbo[j].vid_size_v = cgGetNamedParameter(prg[i].vprg, attr_buf);
prg[i].fbo[j].vid_size_f = cgGetNamedParameter(prg[i].fprg, attr_buf);
snprintf(attr_buf, sizeof(attr_buf), "PASS%u.texture_size", j + 1);
prg[i].fbo[j].tex_size_v = cgGetNamedParameter(prg[i].vprg, attr_buf);
prg[i].fbo[j].tex_size_f = cgGetNamedParameter(prg[i].fprg, attr_buf);
snprintf(attr_buf, sizeof(attr_buf), "PASS%u.tex_coord", j + 1);
prg[i].fbo[j].coord = cgGetNamedParameter(prg[i].vprg, attr_buf);
}
}
bool gl_cg_init(const char *path)
{
#ifdef HAVE_CG_RUNTIME_COMPILER
cgRTCgcInit();
#endif
if (!cgCtx)
cgCtx = cgCreateContext();
if (cgCtx == NULL)
{
RARCH_ERR("Failed to create Cg context\n");
return false;
}
#ifdef RARCH_CG_DEBUG
cgGLSetDebugMode(CG_TRUE);
cgSetErrorHandler(cg_error_handler, NULL);
#endif
cgFProf = cgGLGetLatestProfile(CG_GL_FRAGMENT);
cgVProf = cgGLGetLatestProfile(CG_GL_VERTEX);
if (cgFProf == CG_PROFILE_UNKNOWN || cgVProf == CG_PROFILE_UNKNOWN)
{
RARCH_ERR("Invalid profile type\n");
return false;
}
#ifndef HAVE_RGL
RARCH_LOG("[Cg]: Vertex profile: %s\n", cgGetProfileString(cgVProf));
RARCH_LOG("[Cg]: Fragment profile: %s\n", cgGetProfileString(cgFProf));
#endif
cgGLSetOptimalOptions(cgFProf);
cgGLSetOptimalOptions(cgVProf);
cgGLEnableProfile(cgFProf);
cgGLEnableProfile(cgVProf);
if (path && strcmp(path_get_extension(path), "cgp") == 0)
{
if (!load_preset(path))
return false;
}
else
{
if (!load_plain(path))
return false;
}
prg[0].mvp = cgGetNamedParameter(prg[0].vprg, "modelViewProj");
for (unsigned i = 1; i <= cg_shader->passes; i++)
set_program_attributes(i);
// If we aren't using last pass non-FBO shader,
// this shader will be assumed to be "fixed-function".
// Just use prg[0] for that pass, which will be
// pass-through.
prg[cg_shader->passes + 1] = prg[0];
cgGLBindProgram(prg[1].fprg);
cgGLBindProgram(prg[1].vprg);
cg_active = true;
return true;
}
void gl_cg_use(unsigned index)
{
if (cg_active && prg[index].vprg && prg[index].fprg)
{
gl_cg_reset_attrib();
active_index = index;
cgGLBindProgram(prg[index].vprg);
cgGLBindProgram(prg[index].fprg);
}
}
unsigned gl_cg_num(void)
{
if (cg_active)
return cg_shader->passes;
else
return 0;
}
bool gl_cg_filter_type(unsigned index, bool *smooth)
{
if (cg_active && index)
{
if (cg_shader->pass[index - 1].filter == RARCH_FILTER_UNSPEC)
return false;
*smooth = cg_shader->pass[index - 1].filter == RARCH_FILTER_LINEAR;
return true;
}
else
return false;
}
void gl_cg_shader_scale(unsigned index, struct gfx_fbo_scale *scale)
{
if (cg_active && index)
*scale = cg_shader->pass[index - 1].fbo;
else
scale->valid = false;
}
void gl_cg_set_compiler_args(const char **argv)
{
cg_arguments = argv;
}
void gl_cg_invalidate_context(void)
{
cgCtx = NULL;
}
const gl_shader_backend_t gl_cg_backend = {
gl_cg_init,
gl_cg_deinit,
gl_cg_set_params,
gl_cg_use,
gl_cg_num,
gl_cg_filter_type,
gl_cg_shader_scale,
gl_cg_set_coords,
gl_cg_set_mvp,
RARCH_SHADER_CG,
};
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