shithub: tinygl

ref: ebd090633199bcceecc318389511a937dc25f777
dir: /src/arrays.c/

#include "zgl.h"
#include <assert.h>
//#include <stdio.h>

#define VERTEX_ARRAY 0x0001
#define COLOR_ARRAY 0x0002
#define NORMAL_ARRAY 0x0004
#define TEXCOORD_ARRAY 0x0008

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];
#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); Everything is fine!
#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];
#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];
#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];
#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);
}