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renderer: Don't use wrapping on NPOT textures if the renderer can't handle it.

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Fixes #13887.
This commit is contained in:
Ryan C. Gordon
2025-09-08 17:06:59 -04:00
parent 2f5bc17ea6
commit 11411bb5ef
4 changed files with 26 additions and 4 deletions
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18
src/render/SDL_render.c
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@@ -4306,6 +4306,11 @@ static bool SDL_RenderTextureTiled_Iterate(SDL_Renderer *renderer, SDL_Texture *
return true;
}
static bool IsNPOT(int x)
{
return (x <= 0) || ((x & (x - 1)) != 0);
}
bool SDL_RenderTextureTiled(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_FRect *srcrect, float scale, const SDL_FRect *dstrect)
{
SDL_FRect real_srcrect;
@@ -4350,11 +4355,18 @@ bool SDL_RenderTextureTiled(SDL_Renderer *renderer, SDL_Texture *texture, const
texture->last_command_generation = renderer->render_command_generation;
// See if we can use geometry with repeating texture coordinates
if (!renderer->software &&
bool do_wrapping = !renderer->software &&
(!srcrect ||
(real_srcrect.x == 0.0f && real_srcrect.y == 0.0f &&
real_srcrect.w == (float)texture->w && real_srcrect.h == (float)texture->h))) {
real_srcrect.w == (float)texture->w && real_srcrect.h == (float)texture->h));
if (do_wrapping) {
if (renderer->npot_texture_wrap_unsupported && (IsNPOT((int) real_srcrect.w) || IsNPOT((int) real_srcrect.h))) {
do_wrapping = false;
}
}
// See if we can use geometry with repeating texture coordinates
if (do_wrapping) {
return SDL_RenderTextureTiled_Wrap(renderer, texture, &real_srcrect, scale, dstrect);
} else {
return SDL_RenderTextureTiled_Iterate(renderer, texture, &real_srcrect, scale, dstrect);

1
src/render/SDL_sysrender.h
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@@ -269,6 +269,7 @@ struct SDL_Renderer
SDL_PixelFormat *texture_formats;
int num_texture_formats;
bool software;
bool npot_texture_wrap_unsupported;
// The window associated with the renderer
SDL_Window *window;

3
src/render/opengl/SDL_render_gl.c
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@@ -1785,6 +1785,9 @@ static bool GL_CreateRenderer(SDL_Renderer *renderer, SDL_Window *window, SDL_Pr
}
}
// texture-rectangle doesn't support GL_REPEAT, it has to be the full NPOT extension (or real OpenGL 2.0+)
renderer->npot_texture_wrap_unsupported = !non_power_of_two_supported;
data->textype = GL_TEXTURE_2D;
if (non_power_of_two_supported) {
data->GL_ARB_texture_non_power_of_two_supported = true;

6
src/render/opengles2/SDL_render_gles2.c
View File

@@ -2295,6 +2295,12 @@ static bool GLES2_CreateRenderer(SDL_Renderer *renderer, SDL_Window *window, SDL
data->GL_EXT_blend_minmax_supported = true;
}
// Full NPOT textures (that can use GL_REPEAT, etc) are a core feature of GLES3,
// and an extension in GLES2.
if ((major < 3) && !SDL_GL_ExtensionSupported("GL_ARB_texture_non_power_of_two")) {
renderer->npot_texture_wrap_unsupported = true;
}
// Set up parameters for rendering
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);