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|
/* ______ ___ ___
* /\ _ \ /\_ \ /\_ \
* \ \ \L\ \\//\ \ \//\ \ __ __ _ __ ___
* \ \ __ \ \ \ \ \ \ \ /'__`\ /'_ `\/\`'__\/ __`\
* \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \
* \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/
* \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/
* /\____/
* \_/__/
*
* OpenGL implementation of some of the primitive routines.
*
*
* By Pavel Sountsov.
*
* See readme.txt for copyright information.
*/
#include "allegro5/allegro.h"
#include "allegro5/allegro_primitives.h"
#include "allegro5/allegro_opengl.h"
#include "allegro5/internal/aintern_prim_opengl.h"
#include "allegro5/internal/aintern_prim_soft.h"
#include "allegro5/platform/alplatf.h"
#include "allegro5/internal/aintern_prim.h"
#ifdef ALLEGRO_CFG_OPENGL
#include "allegro5/allegro_opengl.h"
#include "allegro5/internal/aintern_opengl.h"
static void convert_storage(ALLEGRO_PRIM_STORAGE storage, GLenum* type, int* ncoord, bool* normalized)
{
switch(storage) {
case ALLEGRO_PRIM_FLOAT_2:
*type = GL_FLOAT;
*ncoord = 2;
*normalized = false;
break;
case ALLEGRO_PRIM_FLOAT_3:
*type = GL_FLOAT;
*ncoord = 3;
*normalized = false;
break;
case ALLEGRO_PRIM_SHORT_2:
*type = GL_SHORT;
*ncoord = 2;
*normalized = false;
break;
default:
ASSERT(0);
}
}
static void setup_state(const char* vtxs, const ALLEGRO_VERTEX_DECL* decl, ALLEGRO_BITMAP* texture)
{
if(decl) {
ALLEGRO_VERTEX_ELEMENT* e;
e = &decl->elements[ALLEGRO_PRIM_POSITION];
if(e->attribute) {
int ncoord = 0;
GLenum type = 0;
bool normalized;
glEnableClientState(GL_VERTEX_ARRAY);
convert_storage(e->storage, &type, &ncoord, &normalized);
glVertexPointer(ncoord, type, decl->stride, vtxs + e->offset);
} else {
glDisableClientState(GL_VERTEX_ARRAY);
}
e = &decl->elements[ALLEGRO_PRIM_TEX_COORD];
if(!e->attribute)
e = &decl->elements[ALLEGRO_PRIM_TEX_COORD_PIXEL];
if(texture && e->attribute) {
int ncoord = 0;
GLenum type = 0;
bool normalized;
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
convert_storage(e->storage, &type, &ncoord, &normalized);
glTexCoordPointer(ncoord, type, decl->stride, vtxs + e->offset);
} else {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
e = &decl->elements[ALLEGRO_PRIM_COLOR_ATTR];
if(e->attribute) {
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_FLOAT, decl->stride, vtxs + e->offset);
} else {
glDisableClientState(GL_COLOR_ARRAY);
glColor4f(1, 1, 1, 1);
}
} else {
const ALLEGRO_VERTEX* vtx = (const ALLEGRO_VERTEX*)vtxs;
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(ALLEGRO_VERTEX), &vtx[0].x);
glColorPointer(4, GL_FLOAT, sizeof(ALLEGRO_VERTEX), &vtx[0].color.r);
glTexCoordPointer(2, GL_FLOAT, sizeof(ALLEGRO_VERTEX), &vtx[0].u);
}
if (texture) {
GLuint gl_texture = al_get_opengl_texture(texture);
int true_w, true_h;
int tex_x, tex_y;
GLuint current_texture;
float mat[4][4] = {
{1, 0, 0, 0},
{0, -1, 0, 0},
{0, 0, 1, 0},
{0, 0, 0, 1}
};
int height;
if (texture->parent)
height = texture->parent->h;
else
height = texture->h;
al_get_opengl_texture_size(texture, &true_w, &true_h);
al_get_opengl_texture_position(texture, &tex_x, &tex_y);
mat[3][0] = (float)tex_x / true_w;
mat[3][1] = (float)(height - tex_y) / true_h;
if(decl) {
if(decl->elements[ALLEGRO_PRIM_TEX_COORD_PIXEL].attribute) {
mat[0][0] = 1.0f / true_w;
mat[1][1] = -1.0f / true_h;
} else {
mat[0][0] = (float)al_get_bitmap_width(texture) / true_w;
mat[1][1] = -(float)al_get_bitmap_height(texture) / true_h;
}
} else {
mat[0][0] = 1.0f / true_w;
mat[1][1] = -1.0f / true_h;
}
glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)¤t_texture);
if (current_texture != gl_texture) {
glBindTexture(GL_TEXTURE_2D, gl_texture);
}
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(mat[0]);
glMatrixMode(GL_MODELVIEW);
} else {
glBindTexture(GL_TEXTURE_2D, 0);
}
}
#endif /* ALLEGRO_CFG_OPENGL */
int _al_draw_prim_opengl(ALLEGRO_BITMAP* target, ALLEGRO_BITMAP* texture, const void* vtxs, const ALLEGRO_VERTEX_DECL* decl, int start, int end, int type)
{
#ifdef ALLEGRO_CFG_OPENGL
int num_primitives = 0;
ALLEGRO_DISPLAY *ogl_disp = target->display;
ALLEGRO_BITMAP_OGL *ogl_target = (ALLEGRO_BITMAP_OGL *)target;
const void* vtx;
int stride = decl ? decl->stride : (int)sizeof(ALLEGRO_VERTEX);
int num_vtx;
if (target->parent) {
ogl_target = (ALLEGRO_BITMAP_OGL *)target->parent;
}
if ((!ogl_target->is_backbuffer && ogl_disp->ogl_extras->opengl_target != ogl_target) || al_is_bitmap_locked(target)) {
return _al_draw_prim_soft(texture, vtxs, decl, start, end, type);
}
vtx = (const char*)vtxs + start * stride;
num_vtx = end - start;
_al_opengl_set_blender(ogl_disp);
setup_state(vtx, decl, texture);
if(texture) {
glEnable(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
switch (type) {
case ALLEGRO_PRIM_LINE_LIST: {
glDrawArrays(GL_LINES, 0, num_vtx);
num_primitives = num_vtx / 2;
break;
};
case ALLEGRO_PRIM_LINE_STRIP: {
glDrawArrays(GL_LINE_STRIP, 0, num_vtx);
num_primitives = num_vtx - 1;
break;
};
case ALLEGRO_PRIM_LINE_LOOP: {
glDrawArrays(GL_LINE_LOOP, 0, num_vtx);
num_primitives = num_vtx;
break;
};
case ALLEGRO_PRIM_TRIANGLE_LIST: {
glDrawArrays(GL_TRIANGLES, 0, num_vtx);
num_primitives = num_vtx / 3;
break;
};
case ALLEGRO_PRIM_TRIANGLE_STRIP: {
glDrawArrays(GL_TRIANGLE_STRIP, 0, num_vtx);
num_primitives = num_vtx - 2;
break;
};
case ALLEGRO_PRIM_TRIANGLE_FAN: {
glDrawArrays(GL_TRIANGLE_FAN, 0, num_vtx);
num_primitives = num_vtx - 2;
break;
};
case ALLEGRO_PRIM_POINT_LIST: {
glDrawArrays(GL_POINTS, 0, num_vtx);
num_primitives = num_vtx;
break;
};
}
if(texture) {
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
return num_primitives;
#else
(void)target;
(void)texture;
(void)vtxs;
(void)decl;
(void)start;
(void)end;
(void)type;
return 0;
#endif
}
int _al_draw_prim_indexed_opengl(ALLEGRO_BITMAP *target, ALLEGRO_BITMAP* texture, const void* vtxs, const ALLEGRO_VERTEX_DECL* decl, const int* indices, int num_vtx, int type)
{
#ifdef ALLEGRO_CFG_OPENGL
int num_primitives = 0;
ALLEGRO_DISPLAY *ogl_disp = target->display;
ALLEGRO_BITMAP_OGL *ogl_target = (ALLEGRO_BITMAP_OGL *)target;
const void* vtx;
const void* idx = indices;
GLenum idx_size;
#if defined ALLEGRO_GP2XWIZ || defined ALLEGRO_IPHONE
GLushort ind[num_vtx];
int ii;
#endif
if (target->parent) {
ogl_target = (ALLEGRO_BITMAP_OGL *)target->parent;
}
if ((!ogl_target->is_backbuffer && ogl_disp->ogl_extras->opengl_target != ogl_target) || al_is_bitmap_locked(target)) {
return _al_draw_prim_indexed_soft(texture, decl, vtxs, indices, num_vtx, type);
}
vtx = vtxs;
_al_opengl_set_blender(ogl_disp);
setup_state(vtx, decl, texture);
if(texture) {
glEnable(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
#if defined ALLEGRO_GP2XWIZ || defined ALLEGRO_IPHONE
for (ii = 0; ii < num_vtx; ii++) {
ind[ii] = (GLushort)indices[ii];
}
idx = ind;
idx_size = GL_UNSIGNED_SHORT;
#else
idx_size = GL_UNSIGNED_INT;
#endif
switch (type) {
case ALLEGRO_PRIM_LINE_LIST: {
glDrawElements(GL_LINES, num_vtx, idx_size, idx);
num_primitives = num_vtx / 2;
break;
};
case ALLEGRO_PRIM_LINE_STRIP: {
glDrawElements(GL_LINE_STRIP, num_vtx, idx_size, idx);
num_primitives = num_vtx - 1;
break;
};
case ALLEGRO_PRIM_LINE_LOOP: {
glDrawElements(GL_LINE_LOOP, num_vtx, idx_size, idx);
num_primitives = num_vtx;
break;
};
case ALLEGRO_PRIM_TRIANGLE_LIST: {
glDrawElements(GL_TRIANGLES, num_vtx, idx_size, idx);
num_primitives = num_vtx / 3;
break;
};
case ALLEGRO_PRIM_TRIANGLE_STRIP: {
glDrawElements(GL_TRIANGLE_STRIP, num_vtx, idx_size, idx);
num_primitives = num_vtx - 2;
break;
};
case ALLEGRO_PRIM_TRIANGLE_FAN: {
glDrawElements(GL_TRIANGLE_FAN, num_vtx, idx_size, idx);
num_primitives = num_vtx - 2;
break;
};
case ALLEGRO_PRIM_POINT_LIST: {
glDrawElements(GL_POINTS, num_vtx, idx_size, idx);
num_primitives = num_vtx;
break;
};
}
if(texture) {
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
return num_primitives;
#else
(void)target;
(void)texture;
(void)vtxs;
(void)decl;
(void)indices;
(void)num_vtx;
(void)type;
return 0;
#endif
}
|
