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Minimize amount of data copied to display server

This commit is contained in:
Juhani Krekelä 2021-11-16 08:08:47 +02:00
parent 072ebb5632
commit 6318896f2d
1 changed files with 17 additions and 10 deletions
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27
sortix.c
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@ -148,23 +148,25 @@ static void sortix_draw_bitmap(struct graphics_device *dev, struct bitmap *bmp,
{
struct window_data *window_data = dev->driver_data;
warnx("sortix_draw_bitmap(%p, %p, %i, %i)", dev, bmp, x1, y1); //debg
size_t width = bmp->x;
size_t height = bmp->y;
if (!width || !height)
return;
// TODO: Overflow when multiplying
uint32_t *buffer = mem_alloc(width * height * sizeof(uint32_t));
for (size_t y = 0; y < height; y++) {
if (window_data->fb.yres <= y1 + y) continue;
for (size_t x = 0; x < width; x++) {
if (window_data->fb.xres <= x1 + x) continue;
void *pixel_data = ((unsigned char*)bmp->data) + y * bmp->skip + x * sizeof(uint32_t);
uint32_t pixel;
memcpy(&pixel, pixel_data, sizeof(uint32_t));
// Set the alpha channel (see sortix_fill_area() for further details)
// Set alpha (see sortix_fill_area() for more details)
pixel |= 0xff000000;
window_data->fb.buffer[(y1 + y) * window_data->fb.pitch + x + x1] = pixel;
buffer[y * width + x] = pixel;
}
}
display_render_window(connection, window_data->window_id, 0, 0, window_data->fb.xres, window_data->fb.yres, window_data->fb.buffer);
display_render_window(connection, window_data->window_id, x1, y1, width, height, buffer);
free(buffer);
}
static void sortix_fill_area(struct graphics_device *dev, int x1, int y1, int x2, int y2, long color)
@ -173,6 +175,10 @@ static void sortix_fill_area(struct graphics_device *dev, int x1, int y1, int x2
size_t width = x2 - x1;
size_t height = y2 - y1;
if (!width || !height)
return;
// TODO: Overflow when multiplying
uint32_t *buffer = mem_alloc(width * height * sizeof(uint32_t));
// Links uses a pixel format where the top byte is clear
// Sortix stores alpha there, so set it to 255
@ -180,19 +186,20 @@ static void sortix_fill_area(struct graphics_device *dev, int x1, int y1, int x2
for (size_t y = 0; y < height; y++) {
for (size_t x = 0; x < width; x++)
window_data->fb.buffer[(y1 + y) * window_data->fb.pitch + x + x1] = pixel;
buffer[y * width + x] = pixel;
}
display_render_window(connection, window_data->window_id, 0, 0, window_data->fb.xres, window_data->fb.yres, window_data->fb.buffer);
display_render_window(connection, window_data->window_id, x1, y1, width, height, buffer);
free(buffer);
}
static void sortix_draw_hline(struct graphics_device *dev, int x1, int y, int x2, long color)
{
sortix_fill_area(dev, x1, y, x2, y, color);
sortix_fill_area(dev, x1, y, x2, y + 1, color);
}
static void sortix_draw_vline(struct graphics_device *dev, int x, int y1, int y2, long color)
{
sortix_fill_area(dev, x, y1, x, y2, color);
sortix_fill_area(dev, x, y1, x + 1, y2, color);
}
static void sortix_set_title(struct graphics_device *dev, unsigned char *title)