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Enable creation of yuv SDL_Surfaces (#6735)

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This commit is contained in:
Sylvain Becker
2022-12-02 21:53:48 +01:00
committed by GitHub
parent 0a3262e819
commit 92cd2c0a74
9 changed files with 335 additions and 165 deletions
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28
src/render/SDL_yuv_sw.c
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@@ -25,6 +25,7 @@
#if SDL_HAVE_YUV
#include "SDL_yuv_sw_c.h"
#include "../video/SDL_yuv_c.h"
SDL_SW_YUVTexture *
SDL_SW_CreateYUVTexture(Uint32 format, int w, int h)
@@ -56,31 +57,8 @@ SDL_SW_CreateYUVTexture(Uint32 format, int w, int h)
swdata->w = w;
swdata->h = h;
{
const int sz_plane = w * h;
const int sz_plane_chroma = ((w + 1) / 2) * ((h + 1) / 2);
const int sz_plane_packed = ((w + 1) / 2) * h;
int dst_size = 0;
switch (format) {
case SDL_PIXELFORMAT_YV12: /**< Planar mode: Y + V + U (3 planes) */
case SDL_PIXELFORMAT_IYUV: /**< Planar mode: Y + U + V (3 planes) */
dst_size = sz_plane + sz_plane_chroma + sz_plane_chroma;
break;
case SDL_PIXELFORMAT_YUY2: /**< Packed mode: Y0+U0+Y1+V0 (1 plane) */
case SDL_PIXELFORMAT_UYVY: /**< Packed mode: U0+Y0+V0+Y1 (1 plane) */
case SDL_PIXELFORMAT_YVYU: /**< Packed mode: Y0+V0+Y1+U0 (1 plane) */
dst_size = 4 * sz_plane_packed;
break;
case SDL_PIXELFORMAT_NV12: /**< Planar mode: Y + U/V interleaved (2 planes) */
case SDL_PIXELFORMAT_NV21: /**< Planar mode: Y + V/U interleaved (2 planes) */
dst_size = sz_plane + sz_plane_chroma + sz_plane_chroma;
break;
default:
SDL_assert(0 && "We should never get here (caught above)");
break;
}
size_t dst_size;
SDL_CalculateYUVSize(format, w, h, &dst_size, NULL);
swdata->pixels = (Uint8 *)SDL_SIMDAlloc(dst_size);
if (!swdata->pixels) {
SDL_SW_DestroyYUVTexture(swdata);