struct VFile* VFileMemChunk(const void* mem, size_t size) {
struct VFileMem* vfm = malloc(sizeof(struct VFileMem));
if (!vfm) {
return 0;
}
vfm->size = size;
vfm->bufferSize = toPow2(size);
if (size) {
vfm->mem = anonymousMemoryMap(vfm->bufferSize);
if (mem) {
memcpy(vfm->mem, mem, size);
}
} else {
vfm->mem = 0;
}
vfm->offset = 0;
vfm->d.close = _vfmCloseFree;
vfm->d.seek = _vfmSeekExpanding;
vfm->d.read = _vfmRead;
vfm->d.readline = VFileReadline;
vfm->d.write = _vfmWriteExpanding;
vfm->d.map = _vfmMap;
vfm->d.unmap = _vfmUnmap;
vfm->d.truncate = _vfmTruncate;
vfm->d.size = _vfmSize;
vfm->d.sync = _vfmSync;
return &vfm->d;
}
bool TextureOpenGL::create_from_surface(ISurface *p_surface)
{
destroy();
const u32 width = p_surface->get_width();
const u32 height = p_surface->get_height();
const u32 size = toPow2( (width < height) ? height : width );
SurfaceSDL surface_rgb;
bool success = surface_rgb.create_empty(size, size, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
if ( !success ) {
printf("failed create surface\n");
return false;
}
surface_rgb.blit(static_cast<ISurface*>(p_surface), NULL, NULL);
if ( !success ) {
printf("failed blit surface\n");
return false;
}
GLuint tex = _create_from_surface(&surface_rgb);
m_tex_name = tex;
m_desc.width = surface_rgb.get_width();
m_desc.height = surface_rgb.get_height();
return true;
}
static void mGLContextSetDimensions(struct VideoBackend* v, unsigned width, unsigned height) {
struct mGLContext* context = (struct mGLContext*) v;
v->width = width;
v->height = height;
glBindTexture(GL_TEXTURE_2D, context->tex);
#ifdef COLOR_16_BIT
#ifdef COLOR_5_6_5
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, toPow2(width), toPow2(height), 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, 0);
#else
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, toPow2(width), toPow2(height), 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, 0);
#endif
#elif defined(__BIG_ENDIAN__)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, toPow2(width), toPow2(height), 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, 0);
#else
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, toPow2(width), toPow2(height), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
#endif
}
void _vfmExpand(struct VFileMem* vfm, size_t newSize) {
size_t alignedSize = toPow2(newSize);
if (alignedSize > vfm->bufferSize) {
void* oldBuf = vfm->mem;
vfm->mem = anonymousMemoryMap(alignedSize);
if (oldBuf) {
if (newSize < vfm->size) {
memcpy(vfm->mem, oldBuf, newSize);
} else {
memcpy(vfm->mem, oldBuf, vfm->size);
}
mappedMemoryFree(oldBuf, vfm->bufferSize);
}
vfm->bufferSize = alignedSize;
}
vfm->size = newSize;
}
static inline U32
bhv_msk(U32 sz)
{
return toPow2(sz)-1;
}
