etc/sm64coopdx
0
0
Fork 0
mirror of https://github.com/coop-deluxe/sm64coopdx.git synced 2024-12-22 16:30:23 +00:00
Code Issues Projects Releases Packages Wiki Activity

add GL1.3 (or 1.2 with some extensions) rendering backend

Browse source 
there are still some graphical glitches and no fog
This commit is contained in:
fgsfds 2020-05-20 06:58:35 +03:00
parent fb706c42f6
commit c540712154
3 changed files with 533 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
Makefile
View file

@ -48,6 +48,10 @@ TEXTSAVES ?= 0
NO_BZERO_BCOPY ?= 0
NO_LDIV ?= 0
# Use OpenGL 1.3 renderer
LEGACY_GL ?= 0
# Automatic settings for PC port(s)
NON_MATCHING := 1
@ -534,6 +538,12 @@ ifeq ($(NO_LDIV),1)
CFLAGS += -DNO_LDIV
endif
# Use OpenGL 1.3
ifeq ($(LEGACY_GL),1)
CC_CHECK += -DLEGACY_GL
CFLAGS += -DLEGACY_GL
endif
ASFLAGS := -I include -I $(BUILD_DIR) $(VERSION_ASFLAGS)
ifeq ($(TARGET_WEB),1)

4
src/pc/gfx/gfx_opengl.c
View file

@ -1,3 +1,5 @@
#ifndef LEGACY_GL
#include <stdint.h>
#include <stdbool.h>
@ -526,3 +528,5 @@ struct GfxRenderingAPI gfx_opengl_api = {
gfx_opengl_start_frame,
gfx_opengl_shutdown
};
#endif // !LEGACY_GL

519
src/pc/gfx/gfx_opengl_legacy.c Normal file
View file

@ -0,0 +1,519 @@
#ifdef LEGACY_GL
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#ifndef _LANGUAGE_C
#define _LANGUAGE_C
#endif
#include <PR/gbi.h>
#ifdef __MINGW32__
#define FOR_WINDOWS 1
#else
#define FOR_WINDOWS 0
#endif
#include <SDL2/SDL.h>
#if FOR_WINDOWS || defined(OSX_BUILD)
#define GLEW_STATIC
#include <GL/glew.h>
#endif
#define GL_GLEXT_PROTOTYPES 1
#include <SDL2/SDL_opengl.h>
#include "gfx_cc.h"
#include "gfx_rendering_api.h"
#include "macros.h"
enum MixFlags {
SH_MF_OVERRIDE_ALPHA = 1,
SH_MF_MULTIPLY = 2,
SH_MF_MIX = 4,
SH_MF_SINGLE = 8,
SH_MF_MULTIPLY_ALPHA = 16,
SH_MF_MIX_ALPHA = 32,
SH_MF_SINGLE_ALPHA = 64,
SH_MF_INPUT_ALPHA = 128,
};
enum MixType {
SH_MT_NONE,
SH_MT_TEXTURE,
SH_MT_COLOR,
SH_MT_TEXTURE_TEXTURE,
SH_MT_TEXTURE_COLOR,
SH_MT_COLOR_COLOR,
};
struct ShaderProgram {
uint32_t shader_id;
enum MixType mix;
uint32_t mix_flags;
bool texture_used[2];
int num_inputs;
};
static struct ShaderProgram shader_program_pool[64];
static uint8_t shader_program_pool_size;
static struct ShaderProgram *cur_shader = NULL;
static const float *cur_buf = NULL;
static size_t cur_buf_size = 0;
static size_t cur_buf_num_tris = 0;
static size_t cur_buf_stride = 0;
static const float c_white[] = { 1.f, 1.f, 1.f, 1.f };
static bool gfx_opengl_z_is_from_0_to_1(void) {
return false;
}
#define TEXENV_COMBINE_ON() glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE)
#define TEXENV_COMBINE_OFF() glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)
#define TEXENV_COMBINE_OP(num, cval, aval) \
do { \
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND ## num ## _RGB, cval); \
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND ## num ## _ALPHA, aval); \
} while (0)
#define TEXENV_COMBINE_SET1(what, mode, val) \
do { \
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ ## what, mode); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ ## what, val); \
} while (0)
#define TEXENV_COMBINE_SET2(what, mode, val1, val2) \
do { \
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ ## what, mode); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ ## what, val1); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ ## what, val2); \
} while (0)
#define TEXENV_COMBINE_SET3(what, mode, val1, val2, val3) \
do { \
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ ## what, mode); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ ## what, val1); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ ## what, val2); \
glTexEnvi(GL_TEXTURE_ENV, GL_SRC2_ ## what, val3); \
} while (0)
static inline void texenv_set_texture_color(struct ShaderProgram *prg) {
glActiveTexture(GL_TEXTURE0);
if (prg->mix_flags & SH_MF_OVERRIDE_ALPHA) {
TEXENV_COMBINE_ON();
if (prg->mix_flags & SH_MF_SINGLE_ALPHA) {
if (prg->mix_flags & SH_MF_MULTIPLY) {
// keep the alpha but modulate the color
const GLenum alphasrc = (prg->mix_flags & SH_MF_INPUT_ALPHA) ? GL_PRIMARY_COLOR : GL_TEXTURE;
TEXENV_COMBINE_SET2(RGB, GL_MODULATE, GL_TEXTURE, GL_PRIMARY_COLOR);
TEXENV_COMBINE_SET1(ALPHA, GL_REPLACE, alphasrc);
} else {
// somehow makes it keep the color while taking the alpha from primary color
TEXENV_COMBINE_SET1(RGB, GL_REPLACE, GL_TEXTURE);
}
} else { // if (prg->mix_flags & SH_MF_SINGLE) {
if (prg->mix_flags & SH_MF_MULTIPLY_ALPHA) {
// modulate the alpha but keep the color
TEXENV_COMBINE_SET2(ALPHA, GL_MODULATE, GL_TEXTURE, GL_PRIMARY_COLOR);
TEXENV_COMBINE_SET1(RGB, GL_REPLACE, GL_TEXTURE);
} else {
// somehow makes it keep the alpha
TEXENV_COMBINE_SET1(ALPHA, GL_REPLACE, GL_TEXTURE);
}
}
// TODO: MIX and the other one
} else if (prg->mix_flags & SH_MF_MULTIPLY) {
// TODO: is this right?
TEXENV_COMBINE_OFF();
} else if (prg->mix_flags & SH_MF_MIX) {
TEXENV_COMBINE_ON();
// HACK: determine this using flags and not this crap
if (prg->num_inputs > 1) {
// out.rgb = mix(color0.rgb, color1.rgb, texel0.rgb);
// no color1 tho, so mix with white (texenv color is set in init())
TEXENV_COMBINE_OP(2, GL_SRC_COLOR, GL_SRC_ALPHA);
TEXENV_COMBINE_SET3(RGB, GL_INTERPOLATE, GL_CONSTANT, GL_PRIMARY_COLOR, GL_TEXTURE);
TEXENV_COMBINE_SET1(ALPHA, GL_REPLACE, GL_CONSTANT);
} else {
// out.rgb = mix(color0.rgb, texel0.rgb, texel0.a);
TEXENV_COMBINE_OP(2, GL_SRC_ALPHA, GL_SRC_ALPHA);
TEXENV_COMBINE_SET3(RGB, GL_INTERPOLATE, GL_TEXTURE, GL_PRIMARY_COLOR, GL_TEXTURE);
}
} else {
TEXENV_COMBINE_OFF();
}
}
static inline void texenv_set_texture_texture(UNUSED struct ShaderProgram *prg) {
glActiveTexture(GL_TEXTURE0);
TEXENV_COMBINE_OFF();
glActiveTexture(GL_TEXTURE1);
TEXENV_COMBINE_ON();
// out.rgb = mix(texel0.rgb, texel1.rgb, color0.rgb);
TEXENV_COMBINE_OP(2, GL_SRC_COLOR, GL_SRC_ALPHA);
TEXENV_COMBINE_SET3(RGB, GL_INTERPOLATE, GL_PREVIOUS, GL_TEXTURE, GL_PRIMARY_COLOR);
// out.a = texel0.a;
TEXENV_COMBINE_SET1(ALPHA, GL_REPLACE, GL_PREVIOUS);
}
static void gfx_opengl_apply_shader(struct ShaderProgram *prg) {
const float *ofs = cur_buf;
// vertices are always there
glVertexPointer(4, GL_FLOAT, cur_buf_stride, ofs);
ofs += 4;
// have texture(s), specify same texcoords for every active texture
for (int i = 0; i < 2; ++i) {
if (prg->texture_used[i]) {
glEnable(GL_TEXTURE0 + i);
glClientActiveTexture(GL_TEXTURE0 + i);
glActiveTexture(GL_TEXTURE0 + i);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, cur_buf_stride, ofs);
glEnable(GL_TEXTURE_2D);
ofs += 2;
}
}
if (prg->shader_id & SHADER_OPT_FOG) {
// have fog, but fog colors are the same for every vertex
// TODO: alpha ain't the same, maybe use glSecondaryColorPointer?
// TODO: or pass start and end from gsSPFogPosition somehow or calculate them from z0, w0 and a0?
// TODO: or alpha blend solid triangles on top, using the fog factor as alpha
// glEnable(GL_FOG);
// glFogi(GL_FOG_MODE, GL_LINEAR);
// glFogfv(GL_FOG_COLOR, ofs);
ofs += 4;
}
if (prg->num_inputs) {
// have colors
// TODO: more than one color (maybe glSecondaryColorPointer?)
// HACK: if there's a texture and two colors, one of them is likely for speculars or some shit (see mario head)
// if there's two colors but no texture, the real color is likely the second one
const int hack = (prg->num_inputs > 1) * (4 - (int)prg->texture_used[0]);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_FLOAT, cur_buf_stride, ofs + hack);
ofs += 4 * prg->num_inputs;
}
if (prg->shader_id & SHADER_OPT_TEXTURE_EDGE) {
// (horrible) alpha discard
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, 0.3f);
}
// configure formulae
switch (prg->mix) {
case SH_MT_TEXTURE:
glActiveTexture(GL_TEXTURE0);
TEXENV_COMBINE_OFF();
break;
case SH_MT_TEXTURE_COLOR:
texenv_set_texture_color(prg);
break;
case SH_MT_TEXTURE_TEXTURE:
texenv_set_texture_texture(prg);
break;
default:
break;
}
}
static void gfx_opengl_unload_shader(struct ShaderProgram *old_prg) {
if (cur_shader == old_prg || old_prg == NULL)
cur_shader = NULL;
glClientActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE0);
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTexture(GL_TEXTURE1);
glActiveTexture(GL_TEXTURE1);
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisable(GL_TEXTURE1);
glDisable(GL_TEXTURE0);
glDisable(GL_TEXTURE_2D);
glDisable(GL_ALPHA_TEST);
glDisableClientState(GL_COLOR_ARRAY);
}
static void gfx_opengl_load_shader(struct ShaderProgram *new_prg) {
cur_shader = new_prg;
// gfx_opengl_apply_shader(cur_shader);
}
static struct ShaderProgram *gfx_opengl_create_and_load_new_shader(uint32_t shader_id) {
uint8_t c[2][4];
for (int i = 0; i < 4; i++) {
c[0][i] = (shader_id >> (i * 3)) & 7;
c[1][i] = (shader_id >> (12 + i * 3)) & 7;
}
bool used_textures[2] = {0, 0};
int num_inputs = 0;
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 4; j++) {
if (c[i][j] >= SHADER_INPUT_1 && c[i][j] <= SHADER_INPUT_4) {
if (c[i][j] > num_inputs) {
num_inputs = c[i][j];
}
}
if (c[i][j] == SHADER_TEXEL0 || c[i][j] == SHADER_TEXEL0A) {
used_textures[0] = true;
}
if (c[i][j] == SHADER_TEXEL1) {
used_textures[1] = true;
}
}
}
const bool color_alpha_same = (shader_id & 0xfff) == ((shader_id >> 12) & 0xfff);
const bool do_multiply[2] = {c[0][1] == 0 && c[0][3] == 0, c[1][1] == 0 && c[1][3] == 0};
const bool do_mix[2] = {c[0][1] == c[0][3], c[1][1] == c[1][3]};
const bool do_single[2] = {c[0][2] == 0, c[1][2] == 0};
struct ShaderProgram *prg = &shader_program_pool[shader_program_pool_size++];
prg->shader_id = shader_id;
prg->num_inputs = num_inputs;
prg->texture_used[0] = used_textures[0];
prg->texture_used[1] = used_textures[1];
if (used_textures[0] && used_textures[1])
prg->mix = SH_MT_TEXTURE_TEXTURE;
else if (used_textures[0] && num_inputs)
prg->mix = SH_MT_TEXTURE_COLOR;
else if (used_textures[0])
prg->mix = SH_MT_TEXTURE;
else if (num_inputs > 1)
prg->mix = SH_MT_COLOR_COLOR;
else if (num_inputs)
prg->mix = SH_MT_COLOR;
if (do_single[0]) prg->mix_flags |= SH_MF_SINGLE;
if (do_multiply[0]) prg->mix_flags |= SH_MF_MULTIPLY;
if (do_mix[0]) prg->mix_flags |= SH_MF_MIX;
if (!color_alpha_same && (shader_id & SHADER_OPT_ALPHA)) {
prg->mix_flags |= SH_MF_OVERRIDE_ALPHA;
if (do_single[1]) prg->mix_flags |= SH_MF_SINGLE_ALPHA;
if (do_multiply[1]) prg->mix_flags |= SH_MF_MULTIPLY_ALPHA;
if (do_mix[1]) prg->mix_flags |= SH_MF_MIX_ALPHA;
if (c[1][3] < SHADER_TEXEL0) prg->mix_flags |= SH_MF_INPUT_ALPHA;
}
gfx_opengl_load_shader(prg);
return prg;
}
static struct ShaderProgram *gfx_opengl_lookup_shader(uint32_t shader_id) {
for (size_t i = 0; i < shader_program_pool_size; i++) {
if (shader_program_pool[i].shader_id == shader_id) {
return &shader_program_pool[i];
}
}
return NULL;
}
static void gfx_opengl_shader_get_info(struct ShaderProgram *prg, uint8_t *num_inputs, bool used_textures[2]) {
*num_inputs = prg->num_inputs;
used_textures[0] = prg->texture_used[0];
used_textures[1] = prg->texture_used[1];
}
static GLuint gfx_opengl_new_texture(void) {
GLuint ret;
glGenTextures(1, &ret);
return ret;
}
static void gfx_opengl_select_texture(int tile, GLuint texture_id) {
glActiveTexture(GL_TEXTURE0 + tile);
glBindTexture(GL_TEXTURE_2D, texture_id);
}
static void gfx_opengl_upload_texture(uint8_t *rgba32_buf, int width, int height) {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, rgba32_buf);
}
static uint32_t gfx_cm_to_opengl(uint32_t val) {
if (val & G_TX_CLAMP)
return GL_CLAMP_TO_EDGE;
return (val & G_TX_MIRROR) ? GL_MIRRORED_REPEAT : GL_REPEAT;
}
static void gfx_opengl_set_sampler_parameters(int tile, bool linear_filter, uint32_t cms, uint32_t cmt) {
const GLenum filter = linear_filter ? GL_LINEAR : GL_NEAREST;
glActiveTexture(GL_TEXTURE0 + tile);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, gfx_cm_to_opengl(cms));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, gfx_cm_to_opengl(cmt));
}
static void gfx_opengl_set_depth_test(bool depth_test) {
if (depth_test) {
glEnable(GL_DEPTH_TEST);
} else {
glDisable(GL_DEPTH_TEST);
}
}
static void gfx_opengl_set_depth_mask(bool z_upd) {
glDepthMask(z_upd ? GL_TRUE : GL_FALSE);
}
static void gfx_opengl_set_zmode_decal(bool zmode_decal) {
if (zmode_decal) {
glPolygonOffset(-2, -2);
glEnable(GL_POLYGON_OFFSET_FILL);
} else {
glPolygonOffset(0, 0);
glDisable(GL_POLYGON_OFFSET_FILL);
}
}
static void gfx_opengl_set_viewport(int x, int y, int width, int height) {
glViewport(x, y, width, height);
}
static void gfx_opengl_set_scissor(int x, int y, int width, int height) {
glScissor(x, y, width, height);
}
static void gfx_opengl_set_use_alpha(bool use_alpha) {
if (use_alpha) {
glEnable(GL_BLEND);
} else {
glDisable(GL_BLEND);
}
}
static void gfx_opengl_draw_triangles(float buf_vbo[], size_t buf_vbo_len, size_t buf_vbo_num_tris) {
//printf("flushing %d tris\n", buf_vbo_num_tris);
cur_buf = buf_vbo;
cur_buf_size = buf_vbo_len * 4;
cur_buf_num_tris = buf_vbo_num_tris;
cur_buf_stride = cur_buf_size / (3 * cur_buf_num_tris);
gfx_opengl_apply_shader(cur_shader);
glDrawArrays(GL_TRIANGLES, 0, 3 * buf_vbo_num_tris);
}
static inline bool gl_check_ext(const char *name) {
static const char *extstr = NULL;
if (extstr == NULL)
extstr = (const char *)glGetString(GL_EXTENSIONS);
if (!strstr(extstr, name)) {
fprintf(stderr, "Required GL extension not supported: %s\n", name);
return false;
}
return true;
}
static inline bool gl_get_version(int *major, int *minor, bool *is_es) {
const char *vstr = (const char *)glGetString(GL_VERSION);
if (!vstr || !vstr[0]) return false;
if (!strncmp(vstr, "OpenGL ES ", 10)) {
vstr += 10;
*is_es = true;
} else if (!strncmp(vstr, "OpenGL ES-CM ", 13)) {
vstr += 13;
*is_es = true;
}
return (sscanf(vstr, "%d.%d", major, minor) == 2);
}
static void gfx_opengl_init(void) {
#if FOR_WINDOWS || defined(OSX_BUILD)
glewInit();
#endif
// check GL version
int vmajor, vminor;
bool is_es = false;
gl_get_version(&vmajor, &vminor, &is_es);
if (vmajor < 2 && vminor < 2 && !is_es) {
fprintf(stderr, "OpenGL 1.2+ is required. Reported version: %s%d.%d\n", is_es ? "ES" : "", vmajor, vminor);
abort();
}
// check extensions that we need
bool supported =
gl_check_ext("GL_ARB_multitexture") &&
gl_check_ext("GL_ARB_texture_env_combine");
if (!supported) abort();
printf("GL_VERSION = %s\n", glGetString(GL_VERSION));
printf("GL_EXTENSIONS =\n%s\n", glGetString(GL_EXTENSIONS));
// these never change
glEnableClientState(GL_VERTEX_ARRAY);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, c_white);
TEXENV_COMBINE_OP(0, GL_SRC_COLOR, GL_SRC_ALPHA);
TEXENV_COMBINE_OP(1, GL_SRC_COLOR, GL_SRC_ALPHA);
}
static void gfx_opengl_start_frame(void) {
glDisable(GL_SCISSOR_TEST);
glDepthMask(GL_TRUE); // Must be set to clear Z-buffer
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_SCISSOR_TEST);
}
static void gfx_opengl_shutdown(void) {
}
struct GfxRenderingAPI gfx_opengl_api = {
gfx_opengl_z_is_from_0_to_1,
gfx_opengl_unload_shader,
gfx_opengl_load_shader,
gfx_opengl_create_and_load_new_shader,
gfx_opengl_lookup_shader,
gfx_opengl_shader_get_info,
gfx_opengl_new_texture,
gfx_opengl_select_texture,
gfx_opengl_upload_texture,
gfx_opengl_set_sampler_parameters,
gfx_opengl_set_depth_test,
gfx_opengl_set_depth_mask,
gfx_opengl_set_zmode_decal,
gfx_opengl_set_viewport,
gfx_opengl_set_scissor,
gfx_opengl_set_use_alpha,
gfx_opengl_draw_triangles,
gfx_opengl_init,
gfx_opengl_start_frame,
gfx_opengl_shutdown
};
#endif // LEGACY_GL