AColMap* a_colmap_new(int Width, int Height, int MaxObjectDim)
{
AColMap* const m = a_mem_malloc(sizeof(AColMap));
#define nextpow(value) \
({ \
int p = 0; \
while((1 << p) < value) p++; \
p; \
})
m->bitShift = nextpow(MaxObjectDim);
m->w = 1 << a_math_max(0, nextpow(Width) - m->bitShift);
m->h = 1 << a_math_max(0, nextpow(Height) - m->bitShift);
m->submaps = a_mem_malloc(m->h * sizeof(AList**));
for(int i = m->h; i--; ) {
m->submaps[i] = a_mem_malloc(m->w * sizeof(AList*));
for(int j = m->w; j--; ) {
m->submaps[i][j] = a_list_new();
}
}
return m;
}
void SpriteGL::Blit(float destx, float desty, float srcx, float srcy, float srcwidth, float srcheight, float destwidth, float destheight)
{
if(!getImage())
return;
if (m_engineCreationTimestamp != g_engine->m_creationTimestamp) { // we need to recreate the texture since the context was invalidated in the meantime
buildGLTexture();
}
glPushMatrix();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, m_texture);
double spriteWidth = nextpow(getWidth()) / m_multiplierx ;
double spriteHeight = nextpow(getHeight()) / m_multipliery;
//glAlphaFunc(GL_GEQUAL, .80);
//glEnable(GL_ALPHA_TEST);
if(m_r != 1. || m_g != 1. || m_b != 1.)
glColor4f(m_r, m_g, m_b, 1.);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glBegin(GL_QUADS);
glTexCoord2d((srcx)/spriteWidth, (srcy)/spriteHeight);
glVertex2d(destx, desty);
glTexCoord2d((srcx)/spriteWidth, (srcy + (srcheight) / m_multipliery )/spriteHeight);
glVertex2d(destx, desty + destheight);
glTexCoord2d((srcx + (srcwidth) / m_multiplierx)/spriteWidth, (srcy + (srcheight) / m_multipliery)/spriteHeight);
glVertex2d(destx + destwidth, desty + destheight);
glTexCoord2d((srcx + (srcwidth) / m_multiplierx)/spriteWidth, (srcy) /spriteHeight);
glVertex2d(destx + destwidth, desty);
glEnd();
if(m_r != 1. || m_g != 1. || m_b != 1.)
glColor4f(1.,1.,1., 1.);
glPopMatrix();
}
