void _al_clear_bitmap_by_locking(ALLEGRO_BITMAP *bitmap, ALLEGRO_COLOR *color)
{
ALLEGRO_LOCKED_REGION *lr;
int x1, y1, w, h;
int x, y;
unsigned char *line_ptr;
/* This function is not just used on memory bitmaps, but also on OpenGL
* video bitmaps which are not the current target, or when locked.
*/
ASSERT(bitmap);
ASSERT(bitmap->flags & (ALLEGRO_MEMORY_BITMAP | _ALLEGRO_INTERNAL_OPENGL));
x1 = bitmap->cl;
y1 = bitmap->ct;
w = bitmap->cr_excl - x1;
h = bitmap->cb_excl - y1;
if (w <= 0 || h <= 0)
return;
/* XXX what about pre-locked bitmaps? */
lr = al_lock_bitmap_region(bitmap, x1, y1, w, h, ALLEGRO_PIXEL_FORMAT_ANY, 0);
if (!lr)
return;
/* Write a single pixel so we can get the raw value. */
_al_put_pixel(bitmap, x1, y1, *color);
/* Fill in the region. */
line_ptr = lr->data;
switch (lr->pixel_size) {
case 2: {
int pixel_value = bmp_read16(line_ptr);
for (y = y1; y < y1 + h; y++) {
if (pixel_value == 0) { /* fast path */
memset(line_ptr, 0, 2 * w);
}
else {
uint16_t *data = (uint16_t *)line_ptr;
for (x = 0; x < w; x++) {
bmp_write16(data, pixel_value);
data++;
}
}
line_ptr += lr->pitch;
}
break;
}
case 3: {
int pixel_value = READ3BYTES(line_ptr);
for (y = y1; y < y1 + h; y++) {
unsigned char *data = (unsigned char *)line_ptr;
if (pixel_value == 0) { /* fast path */
memset(data, 0, 3 * w);
}
else {
for (x = 0; x < w; x++) {
WRITE3BYTES(data, pixel_value);
data += 3;
}
}
line_ptr += lr->pitch;
}
break;
}
case 4: {
int pixel_value = bmp_read32(line_ptr);
for (y = y1; y < y1 + h; y++) {
uint32_t *data = (uint32_t *)line_ptr;
/* Special casing pixel_value == 0 doesn't seem to make any
* difference to speed, so don't bother.
*/
for (x = 0; x < w; x++) {
bmp_write32(data, pixel_value);
data++;
}
line_ptr += lr->pitch;
}
break;
}
case sizeof(float4): {
float4 *data = (float4 *)line_ptr;
float4 pixel_value = *data;
for (y = y1; y < y1 + h; y++) {
data = (float4 *)line_ptr;
for (x = 0; x < w; x++) {
*data = pixel_value;
data++;
}
line_ptr += lr->pitch;
}
break;
}
default:
ASSERT(false);
break;
}
al_unlock_bitmap(bitmap);
}
/* Coordinates are inclusive full-pixel positions. So (0, 0, 0, 0) draws a
* single pixel at 0/0.
*/
static void _al_draw_filled_rectangle_memory_fast(int x1, int y1, int x2, int y2,
ALLEGRO_COLOR *color)
{
ALLEGRO_BITMAP *bitmap;
ALLEGRO_LOCKED_REGION *lr;
int w, h;
int tmp;
int x, y;
unsigned char *line_ptr;
bitmap = al_get_target_bitmap();
/* Make sure it's top left first */
if (x1 > x2) {
tmp = x1;
x1 = x2;
x2 = tmp;
}
if (y1 > y2) {
tmp = y1;
y1 = y2;
y2 = tmp;
}
/* Do clipping */
if (x1 < bitmap->cl) x1 = bitmap->cl;
if (y1 < bitmap->ct) y1 = bitmap->ct;
if (x2 > bitmap->cr_excl - 1) x2 = bitmap->cr_excl - 1;
if (y2 > bitmap->cb_excl - 1) y2 = bitmap->cb_excl - 1;
w = (x2 - x1) + 1;
h = (y2 - y1) + 1;
if (w <= 0 || h <= 0)
return;
/* XXX what about pre-locked bitmaps? */
lr = al_lock_bitmap_region(bitmap, x1, y1, w, h, ALLEGRO_PIXEL_FORMAT_ANY, 0);
if (!lr)
return;
/* Write a single pixel so we can get the raw value. */
_al_put_pixel(bitmap, x1, y1, *color);
/* Fill in the region. */
line_ptr = lr->data;
switch (lr->pixel_size) {
case 2: {
int pixel_value = bmp_read16(line_ptr);
for (y = y1; y < y1 + h; y++) {
if (pixel_value == 0) { /* fast path */
memset(line_ptr, 0, 2 * w);
}
else {
uint16_t *data = (uint16_t *)line_ptr;
for (x = 0; x < w; x++) {
bmp_write16(data, pixel_value);
data++;
}
}
line_ptr += lr->pitch;
}
break;
}
case 3: {
int pixel_value = READ3BYTES(line_ptr);
for (y = y1; y < y1 + h; y++) {
unsigned char *data = (unsigned char *)line_ptr;
if (pixel_value == 0) { /* fast path */
memset(data, 0, 3 * w);
}
else {
for (x = 0; x < w; x++) {
WRITE3BYTES(data, pixel_value);
data += 3;
}
}
line_ptr += lr->pitch;
}
break;
}
case 4: {
int pixel_value = bmp_read32(line_ptr);
for (y = y1; y < y1 + h; y++) {
uint32_t *data = (uint32_t *)line_ptr;
/* Special casing pixel_value == 0 doesn't seem to make any
* difference to speed, so don't bother.
*/
for (x = 0; x < w; x++) {
bmp_write32(data, pixel_value);
data++;
}
line_ptr += lr->pitch;
}
break;
}
case sizeof(float4): {
float4 *data = (float4 *)line_ptr;
float4 pixel_value = *data;
for (y = y1; y < y1 + h; y++) {
data = (float4 *)line_ptr;
for (x = 0; x < w; x++) {
*data = pixel_value;
data++;
}
line_ptr += lr->pitch;
}
break;
}
default:
ASSERT(false);
break;
}
al_unlock_bitmap(bitmap);
}