ref: 1c72eafd3c9621e41723ae6d379dfbb9cebd18ac
dir: /src/arrays.c/
#include "zgl.h"
#include <assert.h>
//#include <stdio.h>
#include "msghandling.h"
//Code for buffers is here too!
GLint free_buffer(GLint handle){
GLContext* c = gl_get_context();
GLSharedState* s = &(c->shared_state);
if(handle == 0 || handle > MAX_BUFFERS) return 1; //error flag
//HANDLE IS HENCEFORTH AN INDEX, AND NOT A HANDLE!!!
handle--;
if(s->buffers[handle]){ //if this handle exists...
if(c->boundarraybuffer == (handle+1)) c->boundarraybuffer = 0;
if(s->buffers[handle]->data) //if this handle has data...
{
void* d = s->buffers[handle]->data;
gl_free(s->buffers[handle]->data); //free the data...
//deal with the possible bindings...
if(c->vertex_array == d) {c->vertex_array = NULL;c->client_states &= ~VERTEX_ARRAY;}
if(c->color_array == d) {c->color_array = NULL;c->client_states &= ~COLOR_ARRAY;}
if(c->normal_array == d) {c->normal_array = NULL;c->client_states &= ~NORMAL_ARRAY;}
if(c->texcoord_array == d) {c->texcoord_array = NULL;c->client_states &= ~TEXCOORD_ARRAY;}
}
gl_free(s->buffers[handle]); //free the buffer...
s->buffers[handle] = NULL; //Set it to null...
return 0;
} else {
return 0;
}
}
GLint check_buffer(GLint handle){ //1 means used, 0 means free, 2 means invalid
GLContext* c = gl_get_context();
GLSharedState* s = &(c->shared_state);
if(handle == 0 || handle > MAX_BUFFERS) return 2; //error flag
handle--;
if(s->buffers[handle]) return 1;
return 0;
}
GLboolean glIsBuffer( GLuint buffer){
if(check_buffer(buffer) == 1) return GL_TRUE;
return GL_FALSE;
}
static inline GLBuffer* get_buffer(GLint handle){
GLContext* c = gl_get_context();
GLSharedState* s = &(c->shared_state);
if(handle == 0 || handle > MAX_BUFFERS) return NULL;
handle--;
return s->buffers[handle];
}
GLint create_buffer(GLint handle){
GLContext* c = gl_get_context();
GLSharedState* s = &(c->shared_state);
if(handle == 0 || handle > MAX_BUFFERS) return 1; //error flag
handle--;//convert from handle to index
if(s->buffers[handle]) free_buffer(handle+1); //this is no longer the handle so we have to add 1.
//This buffer is now free for usage!
s->buffers[handle] = gl_zalloc(sizeof(GLBuffer));
if(!(s->buffers[handle])){
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#define RETVAL 1
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
}
s->buffers[handle]->data = NULL;
s->buffers[handle]->size = 0;
return 0;
}
void glGenBuffers( GLsizei n,
GLuint * buffers)
{GLContext* c = gl_get_context();
#include "error_check.h"
if(n > MAX_BUFFERS) goto error;
{
GLint n_left = n;
GLuint names[n];
for(int i = 1; i <= MAX_BUFFERS && n_left > 0; i++)
if(!check_buffer(i)) names[(n_left--)-1] = i;
if(n_left) goto error; //We were unable to find enough free names.
for(int i = 0; i < n; i++){
create_buffer(names[i]);
//we have this error check here to quit out early in case of GL_OUT_OF_MEMORY
#include "error_check.h"
buffers[i] = names[i];
}
}
return;
error:
for(int i = 0; i < n; i++)
buffers[i] = 0;
return;
}
void glDeleteBuffers( GLsizei n,
const GLuint * buffers)
{GLContext* c = gl_get_context();
#include "error_check.h"
for(GLint i = 0; i < n; i++) free_buffer(buffers[i]);
}
//TODO GL_ARRAY_BUFFER, at a minimum.
void glBindBuffer( GLenum target,
GLuint buffer)
{
GLContext* c = gl_get_context();
#include "error_check.h"
if(buffer == 0 ||
check_buffer(buffer) == 1){
if(target == GL_ARRAY_BUFFER) c->boundarraybuffer = buffer;
}
return;
}
void glBindBufferAsArray(GLenum target,
GLuint buffer,
GLenum type, //GL_FLOAT
GLint size, //number of floats
GLint stride){ //floats between items
GLContext* c = gl_get_context();
#include "error_check.h"
if(target != GL_VERTEX_BUFFER &&
target != GL_NORMAL_BUFFER &&
target != GL_COLOR_BUFFER &&
target != GL_TEXTURE_COORD_BUFFER){
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
return;
#endif
}
if(buffer == 0)
switch(target){
case GL_VERTEX_BUFFER:
glDisableClientState(GL_VERTEX_ARRAY);
glVertexPointer(size, type, stride, NULL);
c->boundvertexbuffer = buffer;
return;
break;
case GL_NORMAL_BUFFER:
glDisableClientState(GL_NORMAL_ARRAY);
glNormalPointer(type, stride, NULL);
c->boundnormalbuffer = buffer;
return;
break;
case GL_COLOR_BUFFER:
glDisableClientState(GL_COLOR_ARRAY);
glColorPointer(size, type, stride, NULL);
c->boundcolorbuffer = buffer;
return;
break;
case GL_TEXTURE_COORD_BUFFER:
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(size, type, stride, NULL);
c->boundtexcoordbuffer = buffer;
return;
break;
default:return;
}
if(check_buffer(buffer) != 1 ||
type != GL_FLOAT){
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
tgl_warning("\ncheck_buffer failed on buffer, or incorrect type\n");
return;
#endif
}
GLBuffer* buf = c->shared_state.buffers[buffer-1];
if(!buf || (buf->data == NULL) || (buf->size == 0)){
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_OPERATION
#include "error_check.h"
#else
tgl_warning("\nbuffer was null, buffer data was null, or buffer size was 0\n");
return;
#endif
}
switch(target){
case GL_VERTEX_BUFFER:
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(size, type, stride, buf->data);
c->boundvertexbuffer = buffer;
break;
case GL_NORMAL_BUFFER:
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(type, stride, buf->data);
c->boundnormalbuffer = buffer;
break;
case GL_COLOR_BUFFER:
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(size, type, stride, buf->data);
c->boundcolorbuffer = buffer;
break;
case GL_TEXTURE_COORD_BUFFER:
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(size, type, stride, buf->data);
c->boundtexcoordbuffer = buffer;
break;
default:return;
}
return;
}
void *glMapBuffer( GLenum target,
GLenum access)
{
GLContext* c = gl_get_context();
#define RETVAL NULL
#include "error_check.h"
GLint handle = 0;
if(target == GL_ARRAY_BUFFER) handle = c->boundarraybuffer;
if(target == GL_VERTEX_BUFFER) handle = c->boundvertexbuffer;
if(target == GL_TEXTURE_COORD_BUFFER) handle = c->boundtexcoordbuffer;
if(target == GL_NORMAL_BUFFER) handle = c->boundnormalbuffer;
if(target == GL_COLOR_BUFFER) handle = c->boundcolorbuffer;
{
if(check_buffer(handle) == 1)
return c->shared_state.buffers[handle-1]->data;
}
#if TGL_FEATURE_ERROR_CHECK == 1
#define RETVAL NULL
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
return NULL;
#endif
}
void glBufferData( GLenum target,
GLsizei size,
const void * data,
GLenum usage) //Usage parameter is ignored.
{
GLContext* c = gl_get_context();
#include "error_check.h"
GLint handle = 0;
GLBuffer* buf = NULL;
if(target == GL_ARRAY_BUFFER) handle = c->boundarraybuffer;
if(target == GL_VERTEX_BUFFER) handle = c->boundvertexbuffer;
if(target == GL_TEXTURE_COORD_BUFFER) handle = c->boundtexcoordbuffer;
if(target == GL_NORMAL_BUFFER) handle = c->boundnormalbuffer;
if(target == GL_COLOR_BUFFER) handle = c->boundcolorbuffer;
if(check_buffer(handle) == 1)
buf = c->shared_state.buffers[handle-1];
else {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
return;
#endif
}
if(buf->data) gl_free(buf->data);
buf->data = NULL; buf->size = 0;
if(size == 0) return; //Allow the user to delete buffer data with glBufferData.
buf->data = gl_malloc(size);
buf->size = size;
if(!(buf->data)){
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
}
if(data != NULL)
memcpy(buf->data, data, size);
}
void glopArrayElement(GLContext* c, GLParam* param) {
GLint i;
GLint states = c->client_states;
GLint idx = param[1].i;
if (states & COLOR_ARRAY) {
GLParam p[5];
GLint size = c->color_array_size;
i = idx * (size + c->color_array_stride);
p[1].f = c->color_array[i];
p[2].f = c->color_array[i + 1];
p[3].f = c->color_array[i + 2];
p[4].f = (size > 3) ? c->color_array[i + 3] : 1.0f;
glopColor(c, p);
}
if (states & NORMAL_ARRAY) {
i = idx * (3 + c->normal_array_stride);
c->current_normal.X = c->normal_array[i];
c->current_normal.Y = c->normal_array[i + 1];
c->current_normal.Z = c->normal_array[i + 2];
//c->current_normal.Z = 0.0f;
}
if (states & TEXCOORD_ARRAY) {
GLint size = c->texcoord_array_size;
i = idx * (size + c->texcoord_array_stride);
c->current_tex_coord.X = c->texcoord_array[i];
c->current_tex_coord.Y = c->texcoord_array[i + 1];
c->current_tex_coord.Z = (size > 2) ? c->texcoord_array[i + 2] : 0.0f;
c->current_tex_coord.W = (size > 3) ? c->texcoord_array[i + 3] : 1.0f;
}
if (states & VERTEX_ARRAY) {
GLParam p[5];
GLint size = c->vertex_array_size;
i = idx * (size + c->vertex_array_stride);
p[1].f = c->vertex_array[i];
p[2].f = c->vertex_array[i + 1];
p[3].f = (size > 2) ? c->vertex_array[i + 2] : 0.0f;
p[4].f = (size > 3) ? c->vertex_array[i + 3] : 1.0f;
glopVertex(c, p);
}
}
void glArrayElement(GLint i) {
GLParam p[2];
#include "error_check_no_context.h"
p[0].op = OP_ArrayElement;
p[1].i = i;
gl_add_op(p);
}
void glDrawArrays( GLenum mode,
GLint first,
GLsizei count){
//Temporary implementation until I figure out MR's "batch geometry processing" idea
#include "error_check_no_context.h"
GLint end = first+count;
glBegin(mode);
for(GLint i = first;i<end;i++)
glArrayElement(i);
glEnd();
}
void glopEnableClientState(GLContext* c, GLParam* p) { c->client_states |= p[1].i; }
void glEnableClientState(GLenum array) {
GLParam p[2];
#include "error_check_no_context.h"
p[0].op = OP_EnableClientState;
switch (array) {
case GL_VERTEX_ARRAY:
p[1].i = VERTEX_ARRAY;
break;
case GL_NORMAL_ARRAY:
p[1].i = NORMAL_ARRAY;
break;
case GL_COLOR_ARRAY:
p[1].i = COLOR_ARRAY;
break;
case GL_TEXTURE_COORD_ARRAY:
p[1].i = TEXCOORD_ARRAY;
break;
default:
assert(0);
break;
}
gl_add_op(p);
}
void glopDisableClientState(GLContext* c, GLParam* p) { c->client_states &= p[1].i; }
void glDisableClientState(GLenum array) {
GLParam p[2];
#include "error_check_no_context.h"
p[0].op = OP_DisableClientState;
switch (array) {
case GL_VERTEX_ARRAY:
p[1].i = ~VERTEX_ARRAY;
break;
case GL_NORMAL_ARRAY:
p[1].i = ~NORMAL_ARRAY;
break;
case GL_COLOR_ARRAY:
p[1].i = ~COLOR_ARRAY;
break;
case GL_TEXTURE_COORD_ARRAY:
p[1].i = ~TEXCOORD_ARRAY;
break;
default:
assert(0);
break;
}
gl_add_op(p);
}
void glopVertexPointer(GLContext* c, GLParam* p) {
c->vertex_array_size = p[1].i;
c->vertex_array_stride = p[2].i;
c->vertex_array = p[3].p;
}
void glVertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid* pointer) {
GLParam p[4];
#define NEED_CONTEXT
#include "error_check_no_context.h"
#if TGL_FEATURE_ERROR_CHECK == 1
if(type != GL_FLOAT)
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
if(type != GL_FLOAT) return;
#endif
p[0].op = OP_VertexPointer;
p[1].i = size;
p[2].i = stride;
p[3].p = (void*)pointer;
gl_add_op(p);
}
void glopColorPointer(GLContext* c, GLParam* p) {
c->color_array_size = p[1].i;
c->color_array_stride = p[2].i;
c->color_array = p[3].p;
}
void glColorPointer(GLint size, GLenum type, GLsizei stride, const GLvoid* pointer) {
GLParam p[4];
#define NEED_CONTEXT
#include "error_check_no_context.h"
#if TGL_FEATURE_ERROR_CHECK == 1
if(type != GL_FLOAT)
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
//assert(type == GL_FLOAT);
#endif
p[0].op = OP_ColorPointer;
p[1].i = size;
p[2].i = stride;
p[3].p = (void*)pointer;
gl_add_op(p);
}
void glopNormalPointer(GLContext* c, GLParam* p) {
c->normal_array_stride = p[1].i;
c->normal_array = p[2].p;
}
void glNormalPointer(GLenum type, GLsizei stride, const GLvoid* pointer) {
GLParam p[3];
#define NEED_CONTEXT
#include "error_check_no_context.h"
#if TGL_FEATURE_ERROR_CHECK == 1
if(type != GL_FLOAT)
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
//assert(type == GL_FLOAT);
#endif
p[0].op = OP_NormalPointer;
p[1].i = stride;
p[2].p = (void*)pointer;
gl_add_op(p);
}
void glopTexCoordPointer(GLContext* c, GLParam* p) {
c->texcoord_array_size = p[1].i;
c->texcoord_array_stride = p[2].i;
c->texcoord_array = p[3].p;
}
void glTexCoordPointer(GLint size, GLenum type, GLsizei stride, const GLvoid* pointer) {
GLParam p[4];
#define NEED_CONTEXT
#include "error_check_no_context.h"
#if TGL_FEATURE_ERROR_CHECK == 1
if(type != GL_FLOAT)
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
//assert(type == GL_FLOAT);
#endif
p[0].op = OP_TexCoordPointer;
p[1].i = size;
p[2].i = stride;
p[3].p = (void*)pointer;
gl_add_op(p);
}