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Disable backface culling and use a constant rectangle winding order.

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This makes it so we don't have to surface the rectangle winding order for applications that want to use the raw geometry API.
This commit is contained in:
Sam Lantinga 2024-09-30 18:26:20 -07:00
parent fa14b53273
commit 45ad763de5
6 changed files with 8 additions and 43 deletions
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19
src/render/SDL_render.c
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@ -149,6 +149,8 @@ static const SDL_RenderDriver *render_drivers[] = {
static SDL_Renderer *SDL_renderers;
static const int rect_index_order[] = { 0, 1, 2, 0, 2, 3 };
void SDL_QuitRender(void)
{
while (SDL_renderers) {
@ -625,7 +627,6 @@ static bool QueueCmdFillRects(SDL_Renderer *renderer, const SDL_FRect *rects, co
const int num_indices = 6 * count;
const int size_indices = 4;
int cur_index = 0;
const int *rect_index_order = renderer->rect_index_order;
for (i = 0; i < count; ++i) {
float minx, miny, maxx, maxy;
@ -1066,16 +1067,6 @@ SDL_Renderer *SDL_CreateRendererWithProperties(SDL_PropertiesID props)
UpdatePixelClipRect(renderer, &renderer->main_view);
UpdateMainViewDimensions(renderer);
// Default value, if not specified by the renderer back-end
if (renderer->rect_index_order[0] == 0 && renderer->rect_index_order[1] == 0) {
renderer->rect_index_order[0] = 0;
renderer->rect_index_order[1] = 1;
renderer->rect_index_order[2] = 2;
renderer->rect_index_order[3] = 0;
renderer->rect_index_order[4] = 2;
renderer->rect_index_order[5] = 3;
}
// new textures start at zero, so we start at 1 so first render doesn't flush by accident.
renderer->render_command_generation = 1;
@ -3806,7 +3797,7 @@ static bool SDL_RenderTextureInternal(SDL_Renderer *renderer, SDL_Texture *textu
float uv[8];
const int uv_stride = 2 * sizeof(float);
const int num_vertices = 4;
const int *indices = renderer->rect_index_order;
const int *indices = rect_index_order;
const int num_indices = 6;
const int size_indices = 4;
float minu, minv, maxu, maxv;
@ -3967,7 +3958,7 @@ bool SDL_RenderTextureRotated(SDL_Renderer *renderer, SDL_Texture *texture,
float uv[8];
const int uv_stride = 2 * sizeof(float);
const int num_vertices = 4;
const int *indices = renderer->rect_index_order;
const int *indices = rect_index_order;
const int num_indices = 6;
const int size_indices = 4;
float minu, minv, maxu, maxv;
@ -4055,7 +4046,7 @@ static bool SDL_RenderTextureTiled_Wrap(SDL_Renderer *renderer, SDL_Texture *tex
float uv[8];
const int uv_stride = 2 * sizeof(float);
const int num_vertices = 4;
const int *indices = renderer->rect_index_order;
const int *indices = rect_index_order;
const int num_indices = 6;
const int size_indices = 4;
float minu, minv, maxu, maxv;