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Initial PCem OpenGL 3.x renderer port

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This commit is contained in:
Cacodemon345
2025-03-08 02:13:14 +06:00
parent 02df55185f
commit 86343327be
17 changed files with 2442 additions and 16 deletions
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308
src/qt/qt_glsl_parser.cpp Normal file
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdint.h>
extern "C"
{
#include <86box/86box.h>
#include <86box/ini.h>
#include <86box/qt-glslp-parser.h>
#include <86box/path.h>
}
#define safe_strncpy(a, b, n) \
do { \
strncpy((a), (b), (n)-1); \
(a)[(n)-1] = 0; \
} while (0)
static int endswith(const char *str, const char *ext) {
int i;
const char *p;
int elen = strlen(ext);
int slen = strlen(str);
if (slen >= elen) {
p = &str[slen - elen];
for (i = 0; i < elen; ++i) {
if (tolower(p[i]) != tolower(ext[i]))
return 0;
}
return 1;
}
return 0;
}
static char *load_file(const char *fn) {
FILE *f = fopen(fn, "rb");
if (!f)
return 0;
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
char *data = (char*)malloc(fsize + 1);
fread(data, fsize, 1, f);
fclose(f);
data[fsize] = 0;
return data;
}
static void strip_lines(const char *program, const char *starts_with) {
/* strip parameters */
char *ptr = strstr(program, starts_with);
while (ptr) {
while (*ptr != '\n' && *ptr != '\0')
*ptr++ = ' ';
ptr = strstr(program, starts_with);
}
}
static void strip_parameters(const char *program) {
/* strip parameters */
strip_lines(program, "#pragma parameter");
}
static void strip_defines(const char *program) {
/* strip texture define */
strip_lines(program, "#define texture");
}
static int has_parameter(glslp_t *glsl, char *id) {
int i;
for (i = 0; i < glsl->num_parameters; ++i)
if (!strcmp(glsl->parameters[i].id, id))
return 1;
return 0;
}
static int get_parameters(glslp_t *glsl) {
int i;
struct parameter p;
for (i = 0; i < glsl->num_shaders; ++i) {
struct shader *shader = &glsl->shaders[i];
FILE *f = fopen(shader->shader_fn, "rb");
if (!f)
return 0;
char line[1024];
while (fgets(line, sizeof(line) - 1, f) && glsl->num_parameters < MAX_PARAMETERS) {
int num = sscanf(line, "#pragma parameter %63s \"%63[^\"]\" %f %f %f %f", p.id, p.description,
&p.default_value, &p.min, &p.max, &p.step);
if (num < 5)
continue;
p.id[63] = 0;
p.description[63] = 0;
if (num == 5)
p.step = 0.1f * (p.max - p.min);
p.value = p.default_value;
if (!has_parameter(glsl, p.id)) {
memcpy(&glsl->parameters[glsl->num_parameters++], &p, sizeof(struct parameter));
pclog("Read parameter: %s (%s) %f, %f -> %f (%f)\n", p.id, p.description, p.default_value, p.min,
p.max, p.step);
}
}
fclose(f);
}
return 1;
}
static struct parameter *get_parameter(glslp_t *glslp, const char *id) {
int i;
for (i = 0; i < glslp->num_parameters; ++i) {
if (!strcmp(glslp->parameters[i].id, id)) {
return &glslp->parameters[i];
}
}
return 0;
}
static glslp_t *glsl_parse(const char *f) {
glslp_t *glslp = (glslp_t*)malloc(sizeof(glslp_t));
memset(glslp, 0, sizeof(glslp_t));
glslp->num_shaders = 1;
struct shader *shader = &glslp->shaders[0];
strcpy(shader->shader_fn, f);
shader->shader_program = load_file(f);
if (!shader->shader_program) {
//wx_simple_messagebox("GLSL error", "Could not load shader %s\n", shader->shader_fn);
glslp_free(glslp);
return 0;
}
strip_parameters(shader->shader_program);
strip_defines(shader->shader_program);
shader->scale_x = shader->scale_y = 1.0f;
strcpy(shader->scale_type_x, "source");
strcpy(shader->scale_type_y, "source");
get_parameters(glslp);
return glslp;
}
extern "C" {
void get_glslp_name(const char *f, char *s, int size) { safe_strncpy(s, path_get_filename((char *)f), size); }
glslp_t *glslp_parse(const char *f) {
int i, j, len, sublen;
char s[513], t[513], z[540];
memset(s, 0, sizeof(s));
if (endswith(f, ".glsl"))
return glsl_parse(f);
void *cfg = wx_config_load(f);
if (!cfg) {
fprintf(stderr, "GLSLP Error: Could not load GLSLP-file %s\n", f);
return 0;
}
glslp_t *glslp = (glslp_t*)malloc(sizeof(glslp_t));
memset(glslp, 0, sizeof(glslp_t));
get_glslp_name(f, glslp->name, sizeof(glslp->name));
wx_config_get_int(cfg, "shaders", &glslp->num_shaders, 0);
wx_config_get_bool(cfg, "filter_linear0", &glslp->input_filter_linear, -1);
for (i = 0; i < glslp->num_shaders; ++i) {
struct shader *shader = &glslp->shaders[i];
snprintf(s, sizeof(s) - 1, "shader%d", i);
if (!wx_config_get_string(cfg, s, t, sizeof(t), 0)) {
/* shader doesn't exist, lets break here */
glslp->num_shaders = i;
break;
}
strcpy(s, f);
*path_get_filename(s) = 0;
snprintf(shader->shader_fn, sizeof(shader->shader_fn) - 1, "%s%s", s, t);
shader->shader_program = load_file(shader->shader_fn);
if (!shader->shader_program) {
fprintf(stderr, "GLSLP Error: Could not load shader %s\n", shader->shader_fn);
glslp_free(glslp);
return 0;
}
strip_parameters(shader->shader_program);
strip_defines(shader->shader_program);
snprintf(s, sizeof(s) - 1, "alias%d", i);
wx_config_get_string(cfg, s, shader->alias, sizeof(shader->alias), 0);
snprintf(s, sizeof(s) - 1, "filter_linear%d", i + 1);
wx_config_get_bool(cfg, s, &shader->filter_linear, 0);
snprintf(s, sizeof(s) - 1, "wrap_mode%d", i);
wx_config_get_string(cfg, s, shader->wrap_mode, sizeof(shader->wrap_mode), 0);
snprintf(s, sizeof(s) - 1, "float_framebuffer%d", i);
wx_config_get_bool(cfg, s, &shader->float_framebuffer, 0);
snprintf(s, sizeof(s) - 1, "srgb_framebuffer%d", i);
wx_config_get_bool(cfg, s, &shader->srgb_framebuffer, 0);
snprintf(s, sizeof(s) - 1, "mipmap_input%d", i);
wx_config_get_bool(cfg, s, &shader->mipmap_input, 0);
strcpy(shader->scale_type_x, "source");
snprintf(s, sizeof(s) - 1, "scale_type_x%d", i);
wx_config_get_string(cfg, s, shader->scale_type_x, sizeof(shader->scale_type_x), 0);
strcpy(shader->scale_type_y, "source");
snprintf(s, sizeof(s) - 1, "scale_type_y%d", i);
wx_config_get_string(cfg, s, shader->scale_type_y, sizeof(shader->scale_type_y), 0);
snprintf(s, sizeof(s) - 1, "scale_type%d", i);
if (wx_config_has_entry(cfg, s)) {
wx_config_get_string(cfg, s, shader->scale_type_x, sizeof(shader->scale_type_x), 0);
wx_config_get_string(cfg, s, shader->scale_type_y, sizeof(shader->scale_type_y), 0);
}
snprintf(s, sizeof(s) - 1, "scale_x%d", i);
wx_config_get_float(cfg, s, &shader->scale_x, 1.0f);
snprintf(s, sizeof(s) - 1, "scale_y%d", i);
wx_config_get_float(cfg, s, &shader->scale_y, 1.0f);
snprintf(s, sizeof(s) - 1, "scale%d", i);
if (wx_config_has_entry(cfg, s)) {
wx_config_get_float(cfg, s, &shader->scale_x, 1.0f);
wx_config_get_float(cfg, s, &shader->scale_y, 1.0f);
}
snprintf(s, sizeof(s) - 1, "frame_count_mod%d", i);
wx_config_get_int(cfg, s, &shader->frame_count_mod, 0);
}
/* textures */
glslp->num_textures = 0;
wx_config_get_string(cfg, "textures", t, sizeof(t), 0);
len = strlen(t);
j = 0;
sublen = 0;
for (i = 0; i < len; ++i) {
if (t[i] == ';' || i == len - 1) {
sublen = (i - j) + ((i == len - 1) ? 1 : 0) + 1;
safe_strncpy(s, t + j, sublen);
s[511 < sublen ? 511 : sublen] = 0;
struct texture *tex = &glslp->textures[glslp->num_textures++];
strcpy(tex->name, s);
wx_config_get_string(cfg, s, tex->path, sizeof(tex->path), 0);
snprintf(z, sizeof(z) - 1, "%s_linear", s);
wx_config_get_bool(cfg, z, &tex->linear, 0);
snprintf(z, sizeof(z) - 1, "%s_mipmap", s);
wx_config_get_bool(cfg, z, &tex->mipmap, 0);
snprintf(z, sizeof(z) - 1, "%s_wrap_mode", s);
wx_config_get_string(cfg, z, tex->wrap_mode, sizeof(tex->wrap_mode), 0);
j = i + 1;
}
}
/* parameters */
get_parameters(glslp);
wx_config_get_string(cfg, "parameters", t, sizeof(t), 0);
len = strlen(t);
j = 0;
sublen = 0;
for (i = 0; i < len; ++i) {
if (t[i] == ';' || i == len - 1) {
sublen = (i - j) + ((i == len - 1) ? 1 : 0) + 1;
safe_strncpy(s, t + j, sublen);
s[511 < sublen ? 511 : sublen] = 0;
struct parameter *p = get_parameter(glslp, s);
if (p)
wx_config_get_float(cfg, s, &p->default_value, 0);
j = i + 1;
}
}
wx_config_free(cfg);
return glslp;
}
void glslp_free(glslp_t *p) {
int i;
for (i = 0; i < p->num_shaders; ++i)
if (p->shaders[i].shader_program)
free(p->shaders[i].shader_program);
free(p);
}
}