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Removed the useless double-buffering in video/video.c, improves performance and reduces RAM usage.

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This commit is contained in:
OBattler
2021-09-13 21:02:15 +02:00
parent 7163f3a4c1
commit 13dc05cfd2
5 changed files with 21 additions and 21 deletions
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14
src/video/video.c
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@@ -74,7 +74,6 @@
volatile int screenshots = 0;
bitmap_t *buffer32 = NULL;
bitmap_t *render_buffer = NULL;
uint8_t fontdat[2048][8]; /* IBM CGA font */
uint8_t fontdatm[2048][16]; /* IBM MDA font */
uint8_t fontdatw[512][32]; /* Wyse700 font */
@@ -364,7 +363,7 @@ video_take_screenshot(const char *fn, int startx, int starty, int y1, int y2, in
for (y = 0; y < h; ++y) {
b_rgb[y] = (png_byte *) malloc(png_get_rowbytes(png_ptr, info_ptr));
for (x = 0; x < w; ++x) {
temp = render_buffer->dat[(y * w) + x];
temp = buffer32->line[starty + y][startx + x];
b_rgb[y][(x) * 3 + 0] = (temp >> 16) & 0xff;
b_rgb[y][(x) * 3 + 1] = (temp >> 8) & 0xff;
@@ -436,19 +435,16 @@ void blit_thread(void *param)
thread_reset_event(blit_data.wake_blit_thread);
MTR_BEGIN("video", "blit_thread");
if (blit_data.y2 > 0) {
if ((video_grayscale || invert_display) && blit_data.y2 > 0) {
for (yy = blit_data.y1; yy < blit_data.y2; yy++) {
if (((blit_data.y + yy) >= 0) && ((blit_data.y + yy) < buffer32->h)) {
if (video_grayscale || invert_display)
video_transform_copy(&(render_buffer->dat)[yy * blit_data.w], &(buffer32->line[blit_data.y + yy][blit_data.x]), blit_data.w);
else
memcpy(&(render_buffer->dat)[yy * blit_data.w], &(buffer32->line[blit_data.y + yy][blit_data.x]), blit_data.w << 2);
video_transform_copy(&(buffer32->line[blit_data.y + yy][blit_data.x]), &(buffer32->line[blit_data.y + yy][blit_data.x]), blit_data.w);
}
}
}
if (screenshots) {
if (render_buffer != NULL)
if (buffer32 != NULL)
video_screenshot(blit_data.x, blit_data.y, blit_data.y1, blit_data.y2, blit_data.w, blit_data.h);
screenshots--;
video_log("screenshot taken, %i left\n", screenshots);
@@ -833,7 +829,6 @@ video_init(void)
/* Account for overscan. */
buffer32 = create_bitmap(2048 + 64, 2048 + 64);
render_buffer = create_bitmap(2048 + 64, 2048 + 64);
for (c = 0; c < 64; c++) {
cgapal[c + 64].r = (((c & 4) ? 2 : 0) | ((c & 0x10) ? 1 : 0)) * 21;
@@ -902,7 +897,6 @@ video_close(void)
free(video_8togs);
free(video_6to8);
destroy_bitmap(render_buffer);
destroy_bitmap(buffer32);
if (fontdatksc5601) {