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Use geometry to implement FillRects

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Sylvain 2021-09-23 22:45:45 +02:00 committed by Ryan C. Gordon
parent b0eef52fe1
commit 37c39d5cb4
1 changed files with 66 additions and 4 deletions
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64
src/render/SDL_render.c
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@ -508,14 +508,76 @@ QueueCmdDrawLines(SDL_Renderer *renderer, const SDL_FPoint * points, const int c
static int
QueueCmdFillRects(SDL_Renderer *renderer, const SDL_FRect * rects, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawSolid(renderer, SDL_RENDERCMD_FILL_RECTS);
SDL_RenderCommand *cmd;
int retval = -1;
int use_geometry = renderer->QueueGeometry && ! (renderer->info.flags & SDL_RENDERER_SOFTWARE);
cmd = PrepQueueCmdDrawSolid(renderer, (use_geometry ? SDL_RENDERCMD_GEOMETRY : SDL_RENDERCMD_FILL_RECTS));
if (cmd != NULL) {
if (use_geometry) {
SDL_bool isstack1;
SDL_bool isstack2;
float *xy = SDL_small_alloc(float, 4 * 2 * count, &isstack1);
int *indices = SDL_small_alloc(int, 6 * count, &isstack2);
if (xy && indices) {
int i;
float *ptr_xy = xy;
int *ptr_indices = indices;
SDL_Color col;
const int xy_stride = 2 * sizeof (float);
const int color_stride = 0;
const int num_vertices = 4 * count;
const int num_indices = 6 * count;
const int size_indices = 4;
SDL_GetRenderDrawColor(renderer, &col.r, &col.g, &col.b, &col.a);
for (i = 0; i < count; ++i) {
float minx, miny, maxx, maxy;
minx = rects[i].x;
miny = rects[i].y;
maxx = rects[i].x + rects[i].w;
maxy = rects[i].y + rects[i].h;
*ptr_xy++ = minx;
*ptr_xy++ = miny;
*ptr_xy++ = maxx;
*ptr_xy++ = miny;
*ptr_xy++ = maxx;
*ptr_xy++ = maxy;
*ptr_xy++ = minx;
*ptr_xy++ = maxy;
*ptr_indices++ = 0;
*ptr_indices++ = 1;
*ptr_indices++ = 2;
*ptr_indices++ = 0;
*ptr_indices++ = 2;
*ptr_indices++ = 3;
}
retval = renderer->QueueGeometry(renderer, cmd, NULL,
xy, xy_stride, &col, color_stride, NULL, 0,
num_vertices, indices, num_indices, size_indices,
1.0f, 1.0f);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
SDL_small_free(xy, isstack1);
SDL_small_free(indices, isstack2);
}
} else {
retval = renderer->QueueFillRects(renderer, cmd, rects, count);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
}
return retval;
}