ref: ff66214c382e9fec0834eb4282a874f4a31f31f1
dir: /src/init.c/
#include "zgl.h"
#include "msghandling.h"
GLContext gl_ctx;
const GLContext empty_gl_ctx = {0};
void initSharedState(GLContext* c) {
GLSharedState* s = &c->shared_state;
s->lists = gl_zalloc(sizeof(GLList*) * MAX_DISPLAY_LISTS);
if(!s->lists)
gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
s->texture_hash_table = gl_zalloc(sizeof(GLTexture*) * TEXTURE_HASH_TABLE_SIZE);
if(!s->texture_hash_table)
gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
s->buffers = gl_zalloc(sizeof(GLBuffer*) * MAX_BUFFERS);
if(!s->buffers)
gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
alloc_texture(0);
#include "error_check.h"
}
void endSharedState(GLContext* c) {
GLSharedState* s = &c->shared_state;
GLint i;
GLList* l;
GLParamBuffer *pb, *pb1;
GLTexture *t, *n;
for (i = 0; i < MAX_DISPLAY_LISTS; i++)
if (s->lists[i]) {
l = s->lists[i];
pb = l->first_op_buffer;
while (pb != NULL) {
pb1 = pb->next;
gl_free(pb);
pb = pb1;
}
gl_free(l);
s->lists[i] = NULL;
}
gl_free(s->lists);
for (i = 0; i < TEXTURE_HASH_TABLE_SIZE; i++) {
t = s->texture_hash_table[i];
while (t) {
GLTexture** ht;
if (t->prev == NULL) {
ht = &c->shared_state.texture_hash_table[t->handle & TEXTURE_HASH_TABLE_MASK];
*ht = t->next;
} else {
t->prev->next = t->next;
}
n = t->next;
if (t->next != NULL)
t->next->prev = t->prev;
gl_free(t);
t = n;
}
}
gl_free(s->texture_hash_table);
for(i = 0; i < MAX_BUFFERS; i++){
if(s->buffers[i])
{
if(s->buffers[i]->data){
gl_free(s->buffers[i]->data);
}
gl_free(s->buffers[i]);
}
}
gl_free(s->buffers);
}
#if TGL_FEATURE_TINYGL_RUNTIME_COMPAT_TEST == 1
#define TGL_RUNT_UNION_CAST(i) ((union{GLuint l; GLint ii; GLfloat f;}){i})
#define TGL_FLOAT_ERR(a,b) ((a-b)/b)
int TinyGLRuntimeCompatibilityTest(){
GLfloat t = -0, tf2;
GLint t2 = 1<<31;
if(TGL_RUNT_UNION_CAST(t2).f != t)
return 1;
t2 = 3212836864;
t = -1;
if(TGL_RUNT_UNION_CAST(t2).f != t)
return 1;
if(((GLint)255<<8) != 65280) return 1;
if((GLint)65280>>8 != 255) return 1;
if( ((GLint)-1)>>14 != -1 ) return 1;
if(((GLuint)255<<8) != 65280) return 1;
if((GLuint)65280>>8 != 255) return 1;
if(((GLushort)255<<8) != 65280) return 1;
if((GLushort)65280>>8 != 255) return 1;
if(((GLshort)255<<8) != 65280) return 1;
if((GLshort)65280>>8 != -1) return 1;
#if TGL_FEATURE_FISR == 1
t = fastInvSqrt(37);
tf2 = 1.0/sqrt(37);
if(TGL_FLOAT_ERR(t,tf2) > 0.05) return 1;
t = fastInvSqrt(59);
tf2 = 1.0/sqrt(59);
if(TGL_FLOAT_ERR(t,tf2) > 0.05) return 1;
t = fastInvSqrt(1023);
tf2 = 1.0/sqrt(1023);
if(TGL_FLOAT_ERR(t,tf2) > 0.05) return 1;
t = fastInvSqrt(10000);
tf2 = 1.0/sqrt(10000);
if(TGL_FLOAT_ERR(t,tf2) > 0.05) return 1;
#endif
{ //MEMCPY COMPATIBILITY TEST
GLuint buf1[10];
GLuint buf2[10];
for(int i = 0; i < 10; i++) buf1[i] = (1023<<i) + i + i%-1;
for(int i = 0; i < 10; i++) buf2[i] = (14<<i) + i + i%-4;
memcpy(buf1,buf2,10*4);
for(int i = 0; i < 10; i++) if(buf2[i] != buf1[i]) return 1;
}
if(sizeof(void*) < 4) return 1;
//ZALLOC TEST
for(int i = 0; i < 10; i++){
GLubyte* data = gl_zalloc(1024); //A kilobyte.
if(!data) return 1;
for(int i = 0; i <1024; i++) if(data[i] != 0) return 1;
gl_free(data);
}
return 0;
}
#endif
void glInit(void* zbuffer1) {
ZBuffer* zbuffer = (ZBuffer*)zbuffer1;
GLContext* c;
GLViewport* v;
GLint i;
#if TGL_FEATURE_TINYGL_RUNTIME_COMPAT_TEST == 1
if(TinyGLRuntimeCompatibilityTest()) gl_fatal_error("TINYGL_FAILED_RUNTIME_COMPAT_TEST");
#endif
//c = gl_zalloc(sizeof(GLContext));
gl_ctx = empty_gl_ctx;
c = &gl_ctx;
if(!c) gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
//gl_ctx = c;
c->zb = zbuffer;
#if TGL_FEATURE_ERROR_CHECK == 1
c->error_flag = GL_NO_ERROR;
#endif
/* allocate GLVertex array */
//c->vertex_max = POLYGON_MAX_VERTEX;
//c->vertex = gl_malloc(POLYGON_MAX_VERTEX * sizeof(GLVertex));
//if(!c->vertex) gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
/* viewport */
v = &c->viewport;
v->xmin = 0;
v->ymin = 0;
v->xsize = zbuffer->xsize;
v->ysize = zbuffer->ysize;
v->updated = 1;
/* buffer stuff GL 1.1 */
c->drawbuffer = GL_FRONT;
c->readbuffer = GL_FRONT;
/* shared state */
initSharedState(c);
/* ztext */
c->textsize = 1;
/* buffer */
c->boundarraybuffer = 0; //no bound buffer
c->boundvertexbuffer = 0; //no bound buffer
c->boundcolorbuffer = 0; //no bound buffer
c->boundnormalbuffer = 0; //no bound buffer
c->boundtexcoordbuffer = 0; //no bound buffer
/* lists */
c->exec_flag = 1;
c->compile_flag = 0;
c->print_flag = 0;
c->listbase = 0;
c->in_begin = 0;
/* lights */
for (i = 0; i < MAX_LIGHTS; i++) {
GLLight* l = &c->lights[i];
l->ambient = gl_V4_New(0, 0, 0, 1);
l->diffuse = gl_V4_New(1, 1, 1, 1);
l->specular = gl_V4_New(1, 1, 1, 1);
l->position = gl_V4_New(0, 0, 1, 0);
l->norm_position = gl_V3_New(0, 0, 1);
l->spot_direction = gl_V3_New(0, 0, -1);
l->norm_spot_direction = gl_V3_New(0, 0, -1);
l->spot_exponent = 0;
l->spot_cutoff = 180;
l->attenuation[0] = 1;
l->attenuation[1] = 0;
l->attenuation[2] = 0;
l->enabled = 0;
}
c->first_light = NULL;
c->ambient_light_model = gl_V4_New(0.2, 0.2, 0.2, 1);
c->local_light_model = 0;
c->lighting_enabled = 0;
c->light_model_two_side = 0;
/* default materials */
for (i = 0; i < 2; i++) {
GLMaterial* m = &c->materials[i];
m->emission = gl_V4_New(0, 0, 0, 1);
m->ambient = gl_V4_New(0.2, 0.2, 0.2, 1);
m->diffuse = gl_V4_New(0.8, 0.8, 0.8, 1);
m->specular = gl_V4_New(0, 0, 0, 1);
m->shininess = 0;
}
c->current_color_material_mode = GL_FRONT_AND_BACK;
c->current_color_material_type = GL_AMBIENT_AND_DIFFUSE;
c->color_material_enabled = 0;
/* textures */
glInitTextures(c);
/* blending */
c->zb->enable_blend = 0;
c->zb->sfactor = GL_ONE;
c->zb->dfactor = GL_ZERO;
c->zb->blendeq = GL_FUNC_ADD;
/* default state */
c->current_color.X = 1.0;
c->current_color.Y = 1.0;
c->current_color.Z = 1.0;
c->current_color.W = 0.0;
// Shouldn't ever be used.
// c->longcurrent_color[0] = 65280;
// c->longcurrent_color[1] = 65280;
// c->longcurrent_color[2] = 65280;
c->current_normal.X = 1.0;
c->current_normal.Y = 0.0;
c->current_normal.Z = 0.0;
c->current_normal.W = 0.0;
c->current_edge_flag = 1;
c->current_tex_coord.X = 0;
c->current_tex_coord.Y = 0;
c->current_tex_coord.Z = 0;
c->current_tex_coord.W = 1;
c->polygon_mode_front = GL_FILL;
c->polygon_mode_back = GL_FILL;
c->current_front_face = 0; /* 0 = GL_CCW 1 = GL_CW */
c->current_cull_face = GL_BACK;
c->current_shade_model = GL_SMOOTH;
c->cull_face_enabled = 0;
#if TGL_FEATURE_POLYGON_STIPPLE == 1
c->zb->dostipple = 0;
for (GLint i = 0; i < 128; i++)
c->zb->stipplepattern[i] = 0xFF;
#endif
/* clear */
c->clear_color.v[0] = 0;
c->clear_color.v[1] = 0;
c->clear_color.v[2] = 0;
c->clear_color.v[3] = 0;
c->clear_depth = 0;
/* selection */
c->render_mode = GL_RENDER;
c->select_buffer = NULL;
c->name_stack_size = 0;
/* feedback */
c->feedback_buffer = NULL;
c->feedback_ptr = NULL;
c->feedback_size = 0;
c->feedback_hits = 0;
c->feedback_overflow = 0;
/* matrix */
c->matrix_mode = 0;
c->matrix_stack_depth_max[0] = MAX_MODELVIEW_STACK_DEPTH;
c->matrix_stack_depth_max[1] = MAX_PROJECTION_STACK_DEPTH;
c->matrix_stack_depth_max[2] = MAX_TEXTURE_STACK_DEPTH;
for (i = 0; i < 3; i++) {
c->matrix_stack[i] = gl_zalloc(c->matrix_stack_depth_max[i] * sizeof(M4));
if (!(c->matrix_stack[i])) gl_fatal_error("TINYGL_CANNOT_INIT_OOM");
c->matrix_stack_ptr[i] = c->matrix_stack[i];
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
c->matrix_model_projection_updated = 1;
/* opengl 1.1 arrays */
c->client_states = 0;
/* opengl 1.1 polygon offset */
c->offset_states = 0;
/* clear the resize callback function pointer */
c->gl_resize_viewport = NULL;
/* specular buffer */
#if TGL_FEATURE_SPECULAR_BUFFERS == 1
c->specbuf_first = NULL;
c->specbuf_used_counter = 0;
c->specbuf_num_buffers = 0;
#endif
c->zEnableSpecular = 0;
/* depth test */
c->zb->depth_test = 0;
c->zb->depth_write = 1;
c->zb->pointsize = 1;
/* raster position */
c->rasterpos.X = 0;
c->rasterpos.Y = 0;
c->rasterpos.Z = 0;
c->rasterpos.W = 1;
c->rastervertex.pc.X = 0;
c->rastervertex.pc.Y = 0;
c->rastervertex.pc.Z = 0;
c->rastervertex.pc.W = 1;
c->rasterposvalid = 0;
c->pzoomx = 1;
c->pzoomy = 1;
}
void glClose(void) {
GLContext* c = gl_get_context();
GLuint i;
for (i = 0; i < 3; i++) {
gl_free(c->matrix_stack[i]);
}
i = 0;
#if TGL_FEATURE_SPECULAR_BUFFERS == 1
GLSpecBuf* n = NULL;
for (GLSpecBuf* b = c->specbuf_first; b != NULL; b = n) {
n = b->next;
gl_free(b);
i++;
}
#endif
endSharedState(c);
}