void initSharedState(GLContext *c) {
GLSharedState *s = &c->shared_state;
s->lists = (GLList **)gl_zalloc(sizeof(GLList *) * MAX_DISPLAY_LISTS);
s->texture_hash_table = (GLTexture **)gl_zalloc(sizeof(GLTexture *) * TEXTURE_HASH_TABLE_SIZE);
alloc_texture(c, 0);
}
static GLList *alloc_list(GLContext *c, int list) {
GLList *l;
GLParamBuffer *ob;
l = (GLList *)gl_zalloc(sizeof(GLList));
ob = (GLParamBuffer *)gl_zalloc(sizeof(GLParamBuffer));
ob->next = NULL;
l->first_op_buffer = ob;
ob->ops[0].op = OP_EndList;
c->shared_state.lists[list] = l;
return l;
}
void gl_compile_op(GLContext *c,GLParam *p)
{
int op,op_size;
GLParamBuffer *ob,*ob1;
int index,i;
op=p[0].op;
op_size=op_table_size[op];
index=c->current_op_buffer_index;
ob=c->current_op_buffer;
/* we should be able to add a NextBuffer opcode */
if ((index + op_size) > (OP_BUFFER_MAX_SIZE-2)) {
ob1=gl_zalloc(sizeof(GLParamBuffer));
ob1->next=NULL;
ob->next=ob1;
ob->ops[index].op=OP_NextBuffer;
ob->ops[index+1].p=(void *)ob1;
c->current_op_buffer=ob1;
ob=ob1;
index=0;
}
for(i=0;i<op_size;i++) {
ob->ops[index]=p[i];
index++;
}
c->current_op_buffer_index=index;
}
GLTexture *alloc_texture(GLContext *c, int h) {
GLTexture *t, **ht;
t = (GLTexture *)gl_zalloc(sizeof(GLTexture));
ht = &c->shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE];
t->next = *ht;
t->prev = NULL;
if (t->next)
t->next->prev = t;
*ht = t;
t->handle = h;
return t;
}
void glInit(void *zbuffer1, int textureSize) {
FrameBuffer *zbuffer = (FrameBuffer *)zbuffer1;
GLContext *c;
GLViewport *v;
if ((textureSize & (textureSize - 1)))
error("glInit: texture size not power of two: %d", textureSize);
if (textureSize <= 1 || textureSize > 4096)
error("glInit: texture size not allowed: %d", textureSize);
c = new GLContext();
gl_ctx = c;
c->fb = zbuffer;
c->fb->_textureSize = c->_textureSize = textureSize;
c->fb->_textureSizeMask = (textureSize - 1) << ZB_POINT_ST_FRAC_BITS;
// allocate GLVertex array
c->vertex_max = POLYGON_MAX_VERTEX;
c->vertex = (GLVertex *)gl_malloc(POLYGON_MAX_VERTEX * sizeof(GLVertex));
// viewport
v = &c->viewport;
v->xmin = 0;
v->ymin = 0;
v->xsize = zbuffer->xsize;
v->ysize = zbuffer->ysize;
v->updated = 1;
// shared state
initSharedState(c);
// lists
c->exec_flag = 1;
c->compile_flag = 0;
c->print_flag = 0;
c->in_begin = 0;
// lights
for (int i = 0; i < T_MAX_LIGHTS; i++) {
GLLight *l = &c->lights[i];
l->ambient = Vector4(0, 0, 0, 1);
if (i == 0) {
l->diffuse = Vector4(1, 1, 1, 1);
l->specular = Vector4(1, 1, 1, 1);
l->has_specular = true;
} else {
l->diffuse = Vector4(0, 0, 0, 1);
l->specular = Vector4(0, 0, 0, 1);
l->has_specular = false;
}
l->position = Vector4(0, 0, 1, 0);
l->spot_direction = Vector3(0, 0, -1);
l->spot_exponent = 0;
l->spot_cutoff = 180;
l->attenuation[0] = 1;
l->attenuation[1] = 0;
l->attenuation[2] = 0;
l->cos_spot_cutoff = -1.0f;
l->norm_spot_direction = Vector3(0, 0, -1);
l->norm_position = Vector3(0, 0, 1);
l->enabled = 0;
l->next = NULL;
l->prev = NULL;
}
c->first_light = NULL;
c->ambient_light_model = Vector4(0.2f, 0.2f, 0.2f, 1);
c->local_light_model = 0;
c->lighting_enabled = 0;
c->light_model_two_side = 0;
// default materials */
for (int i = 0; i < 2; i++) {
GLMaterial *m = &c->materials[i];
m->emission = Vector4(0, 0, 0, 1);
m->ambient = Vector4(0.2f, 0.2f, 0.2f, 1);
m->diffuse = Vector4(0.8f, 0.8f, 0.8f, 1);
m->specular = Vector4(0, 0, 0, 1);
m->has_specular = false;
m->shininess = 0;
}
c->current_color_material_mode = TGL_FRONT_AND_BACK;
c->current_color_material_type = TGL_AMBIENT_AND_DIFFUSE;
c->color_material_enabled = 0;
// textures
glInitTextures(c);
// default state
c->current_color = Vector4(1.0f, 1.0f, 1.0f, 1.0f);
c->longcurrent_color[0] = 65535;
c->longcurrent_color[1] = 65535;
c->longcurrent_color[2] = 65535;
c->longcurrent_color[3] = 65535;
c->current_normal = Vector4(1.0f, 0.0f, 0.0f, 0.0f);
c->current_edge_flag = 1;
c->current_tex_coord = Vector4(0.0f, 0.0f, 0.0f, 1.0f);
c->polygon_mode_front = TGL_FILL;
c->polygon_mode_back = TGL_FILL;
c->current_front_face = 0; // 0 = GL_CCW 1 = GL_CW
c->current_cull_face = TGL_BACK;
c->current_shade_model = TGL_SMOOTH;
c->cull_face_enabled = 0;
// clear
c->clear_color = Vector4(0.0f, 0.0f, 0.0f, 0.0f);
c->clear_depth = 0;
// selection
c->render_mode = TGL_RENDER;
c->select_buffer = NULL;
c->name_stack_size = 0;
// blending
c->fb->enableBlending(false);
// alpha test
c->fb->enableAlphaTest(false);
// 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 (int i = 0; i < 3; i++) {
c->matrix_stack[i] = (Matrix4 *)gl_zalloc(c->matrix_stack_depth_max[i] * sizeof(Matrix4));
c->matrix_stack_ptr[i] = c->matrix_stack[i];
}
tglMatrixMode(TGL_PROJECTION);
tglLoadIdentity();
tglMatrixMode(TGL_TEXTURE);
tglLoadIdentity();
tglMatrixMode(TGL_MODELVIEW);
tglLoadIdentity();
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
tglAlphaFunc(TGL_ALWAYS, 0.f);
tglDepthFunc(TGL_LESS);
c->matrix_model_projection_updated = 1;
// opengl 1.1 arrays
c->client_states = 0;
// opengl 1.1 polygon offset
c->offset_states = 0;
// shadow mode
c->shadow_mode = 0;
// clear the resize callback function pointer
c->gl_resize_viewport = NULL;
// specular buffer
c->specbuf_first = NULL;
c->specbuf_used_counter = 0;
c->specbuf_num_buffers = 0;
// depth test
c->depth_test = 0;
c->color_mask = (1 << 24) | (1 << 16) | (1 << 8) | (1 << 0);
const int kDrawCallMemory = 5 * 1024 * 1024;
c->_currentAllocatorIndex = 0;
c->_drawCallAllocator[0].initialize(kDrawCallMemory);
c->_drawCallAllocator[1].initialize(kDrawCallMemory);
c->_enableDirtyRectangles = false;
Graphics::Internal::tglBlitSetScissorRect(0, 0, c->fb->xsize, c->fb->ysize);
}
void glInit(void *zbuffer1) {
ZBuffer *zbuffer = (ZBuffer *)zbuffer1;
GLContext *c;
GLViewport *v;
c = (GLContext *)gl_zalloc(sizeof(GLContext));
gl_ctx = c;
c->zb = zbuffer;
// allocate GLVertex array
c->vertex_max = POLYGON_MAX_VERTEX;
c->vertex = (GLVertex *)gl_malloc(POLYGON_MAX_VERTEX * sizeof(GLVertex));
// viewport
v = &c->viewport;
v->xmin = 0;
v->ymin = 0;
v->xsize = zbuffer->xsize;
v->ysize = zbuffer->ysize;
v->updated = 1;
// shared state
initSharedState(c);
// lists
c->exec_flag = 1;
c->compile_flag = 0;
c->print_flag = 0;
c->in_begin = 0;
// lights
for (int i = 0; i < T_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(0.2f, 0.2f, 0.2f, 1);
c->local_light_model = 0;
c->lighting_enabled = 0;
c->light_model_two_side = 0;
// default materials */
for (int i = 0; i < 2; i++) {
GLMaterial *m = &c->materials[i];
m->emission = gl_V4_New(0, 0, 0, 1);
m->ambient = gl_V4_New(0.2f, 0.2f, 0.2f, 1);
m->diffuse = (gl_V4_New(0.8f, 0.8f, 0.8f, 1));
m->specular = gl_V4_New(0, 0, 0, 1);
m->shininess = 0;
}
c->current_color_material_mode = TGL_FRONT_AND_BACK;
c->current_color_material_type = TGL_AMBIENT_AND_DIFFUSE;
c->color_material_enabled = 0;
// textures
glInitTextures(c);
// default state
c->current_color.X = 1.0;
c->current_color.Y = 1.0;
c->current_color.Z = 1.0;
c->current_color.W = 1.0;
c->longcurrent_color[0] = 65535;
c->longcurrent_color[1] = 65535;
c->longcurrent_color[2] = 65535;
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 = TGL_FILL;
c->polygon_mode_back = TGL_FILL;
c->current_front_face = 0; // 0 = GL_CCW 1 = GL_CW
c->current_cull_face = TGL_BACK;
c->current_shade_model = TGL_SMOOTH;
c->cull_face_enabled = 0;
// 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 = TGL_RENDER;
c->select_buffer = NULL;
c->name_stack_size = 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 (int i = 0; i < 3; i++) {
c->matrix_stack[i] = (M4 *)gl_zalloc(c->matrix_stack_depth_max[i] * sizeof(M4));
c->matrix_stack_ptr[i] = c->matrix_stack[i];
}
tglMatrixMode(TGL_PROJECTION);
tglLoadIdentity();
tglMatrixMode(TGL_TEXTURE);
tglLoadIdentity();
tglMatrixMode(TGL_MODELVIEW);
tglLoadIdentity();
c->matrix_model_projection_updated = 1;
// opengl 1.1 arrays
c->client_states = 0;
// opengl 1.1 polygon offset
c->offset_states = 0;
// shadow mode
c->shadow_mode = 0;
// clear the resize callback function pointer
c->gl_resize_viewport = NULL;
// specular buffer
c->specbuf_first = NULL;
c->specbuf_used_counter = 0;
c->specbuf_num_buffers = 0;
// depth test
c->depth_test = 0;
c->color_mask = (1 << 24) | (1 << 16) | (1 << 8) | (1 << 0);
}