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Forward scale mode to SW renderer (Bug 5313)

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This commit is contained in:
Sylvain Becker
2020-12-27 20:28:24 +01:00
parent 471d3c363e
commit f9b5f6cc0f
3 changed files with 28 additions and 4 deletions
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25
src/video/SDL_surface.c
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@@ -26,6 +26,7 @@
#include "SDL_RLEaccel_c.h"
#include "SDL_pixels_c.h"
#include "SDL_yuv_c.h"
#include "../render/SDL_sysrender.h"
/* Check to make sure we can safely check multiplication of surface w and pitch and it won't overflow size_t */
@@ -745,6 +746,14 @@ SDL_UpperBlit(SDL_Surface * src, const SDL_Rect * srcrect,
int
SDL_UpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect)
{
return SDL_PrivateUpperBlitScaled(src, srcrect, dst, dstrect, SDL_ScaleModeNearest);
}
int
SDL_PrivateUpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect, SDL_ScaleMode scaleMode)
{
double src_x0, src_y0, src_x1, src_y1;
double dst_x0, dst_y0, dst_x1, dst_y1;
@@ -889,7 +898,7 @@ SDL_UpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
return 0;
}
return SDL_LowerBlitScaled(src, &final_src, dst, &final_dst);
return SDL_PrivateLowerBlitScaled(src, &final_src, dst, &final_dst, scaleMode);
}
/**
@@ -899,6 +908,13 @@ SDL_UpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
int
SDL_LowerBlitScaled(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect)
{
return SDL_PrivateLowerBlitScaled(src, srcrect, dst, dstrect, SDL_ScaleModeNearest);
}
int
SDL_PrivateLowerBlitScaled(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect, SDL_ScaleMode scaleMode)
{
static const Uint32 complex_copy_flags = (
SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA |
@@ -914,7 +930,12 @@ SDL_LowerBlitScaled(SDL_Surface * src, SDL_Rect * srcrect,
if ( !(src->map->info.flags & complex_copy_flags) &&
src->format->format == dst->format->format &&
!SDL_ISPIXELFORMAT_INDEXED(src->format->format) ) {
return SDL_SoftStretch( src, srcrect, dst, dstrect );
if (scaleMode != SDL_ScaleModeNearest && src->format->BytesPerPixel == 4 && src->format->format != SDL_PIXELFORMAT_ARGB2101010) {
return SDL_SoftStretchLinear(src, srcrect, dst, dstrect);
} else {
return SDL_SoftStretch( src, srcrect, dst, dstrect );
}
} else {
return SDL_LowerBlit( src, srcrect, dst, dstrect );
}