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wlr_renderer: Add single pixel optimization

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Instead of uploading a texture and rendering with the texture, add an
optimization to use the more optimal render_quad code path.
This commit is contained in:
Alexander Orzechowski 2022-07-10 00:04:08 -04:00
parent 5a7c30966c
commit 2a64f19b3b
1 changed files with 49 additions and 0 deletions
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49
render/wlr_renderer.c
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@ -4,6 +4,7 @@
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <wlr/render/interface.h>
#include <wlr/render/pixman.h>
#include <wlr/render/wlr_renderer.h>
@ -147,10 +148,58 @@ bool wlr_render_raster_with_matrix(struct wlr_renderer *r,
return wlr_render_subraster_with_matrix(r, raster, &box, matrix, alpha);
}
static bool try_single_pixel(struct wlr_buffer *buffer,
float color[static 4], const struct wlr_fbox *box, float alpha) {
if (box->width != 1.f || box->height != 1.f ||
box->x < 0.f || box->y < 0.f ||
box->x >= buffer->width || box->y >= buffer->height) {
return false;
}
uint32_t x = floor(box->x);
uint32_t y = floor(box->y);
if (box->x != (float)x || box->y != (float)y) {
return false;
}
void *data;
uint32_t format;
size_t stride;
if (!wlr_buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
return false;
}
if (format != DRM_FORMAT_ARGB8888) {
wlr_buffer_end_data_ptr_access(buffer);
return false;
}
size_t pixel_stride = stride / buffer->width;
uint8_t *data_color = &((uint8_t *)data)[pixel_stride * x + stride * y];
color[0] = data_color[3] * alpha / 255.f;
color[1] = data_color[2] * alpha / 255.f;
color[2] = data_color[1] * alpha / 255.f;
color[3] = data_color[0] * alpha / 255.f;
wlr_buffer_end_data_ptr_access(buffer);
return true;
}
bool wlr_render_subraster_with_matrix(struct wlr_renderer *r,
struct wlr_raster *raster, const struct wlr_fbox *box,
const float matrix[static 9], float alpha) {
assert(r->rendering);
float color[4];
if (raster->buffer &&
try_single_pixel(raster->buffer, (float *)&color, box, alpha)) {
wlr_render_quad_with_matrix(r, color, matrix);
return true;
}
return r->impl->render_subraster_with_matrix(r, raster,
box, matrix, alpha);
}