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Add SDL_PIXELFORMAT_INDEX2LSB and SDL_PIXELFORMAT_INDEX2MSB

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This commit is contained in:
Cameron Cawley 2023-11-17 11:43:39 +00:00 committed by Sam Lantinga
parent cb5b8c9747
commit 67eb03400a
5 changed files with 54 additions and 1 deletions
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12
include/SDL_pixels.h
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@ -61,7 +61,10 @@ typedef enum
SDL_PIXELTYPE_ARRAYU16,
SDL_PIXELTYPE_ARRAYU32,
SDL_PIXELTYPE_ARRAYF16,
SDL_PIXELTYPE_ARRAYF32
SDL_PIXELTYPE_ARRAYF32,
/* This must be at the end of the list to avoid breaking the existing ABI */
SDL_PIXELTYPE_INDEX2
} SDL_PixelType;
/** Bitmap pixel order, high bit -> low bit. */
@ -134,6 +137,7 @@ typedef enum
#define SDL_ISPIXELFORMAT_INDEXED(format) \
(!SDL_ISPIXELFORMAT_FOURCC(format) && \
((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX2) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8)))
@ -177,6 +181,12 @@ typedef enum
SDL_PIXELFORMAT_INDEX1MSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0,
1, 0),
SDL_PIXELFORMAT_INDEX2LSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX2, SDL_BITMAPORDER_4321, 0,
2, 0),
SDL_PIXELFORMAT_INDEX2MSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX2, SDL_BITMAPORDER_1234, 0,
2, 0),
SDL_PIXELFORMAT_INDEX4LSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0,
4, 0),

6
src/test/SDL_test_common.c
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@ -852,6 +852,12 @@ static void SDLTest_PrintPixelFormat(char *text, size_t maxlen, Uint32 format)
case SDL_PIXELFORMAT_INDEX1MSB:
SDL_snprintfcat(text, maxlen, "Index1MSB");
break;
case SDL_PIXELFORMAT_INDEX2LSB:
SDL_snprintfcat(text, maxlen, "Index2LSB");
break;
case SDL_PIXELFORMAT_INDEX2MSB:
SDL_snprintfcat(text, maxlen, "Index2MSB");
break;
case SDL_PIXELFORMAT_INDEX4LSB:
SDL_snprintfcat(text, maxlen, "Index4LSB");
break;

5
src/video/SDL_pixels.c
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@ -91,6 +91,8 @@ const char *SDL_GetPixelFormatName(Uint32 format)
CASE(SDL_PIXELFORMAT_INDEX1LSB)
CASE(SDL_PIXELFORMAT_INDEX1MSB)
CASE(SDL_PIXELFORMAT_INDEX2LSB)
CASE(SDL_PIXELFORMAT_INDEX2MSB)
CASE(SDL_PIXELFORMAT_INDEX4LSB)
CASE(SDL_PIXELFORMAT_INDEX4MSB)
CASE(SDL_PIXELFORMAT_INDEX8)
@ -299,6 +301,9 @@ Uint32 SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bm
case 1:
/* SDL defaults to MSB ordering */
return SDL_PIXELFORMAT_INDEX1MSB;
case 2:
/* SDL defaults to MSB ordering */
return SDL_PIXELFORMAT_INDEX2MSB;
case 4:
/* SDL defaults to MSB ordering */
return SDL_PIXELFORMAT_INDEX4MSB;

4
test/testautomation_pixels.c
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@ -14,6 +14,8 @@ const int _numRGBPixelFormats = 31;
Uint32 _RGBPixelFormats[] = {
SDL_PIXELFORMAT_INDEX1LSB,
SDL_PIXELFORMAT_INDEX1MSB,
SDL_PIXELFORMAT_INDEX2LSB,
SDL_PIXELFORMAT_INDEX2MSB,
SDL_PIXELFORMAT_INDEX4LSB,
SDL_PIXELFORMAT_INDEX4MSB,
SDL_PIXELFORMAT_INDEX8,
@ -47,6 +49,8 @@ Uint32 _RGBPixelFormats[] = {
const char *_RGBPixelFormatsVerbose[] = {
"SDL_PIXELFORMAT_INDEX1LSB",
"SDL_PIXELFORMAT_INDEX1MSB",
"SDL_PIXELFORMAT_INDEX2LSB",
"SDL_PIXELFORMAT_INDEX2MSB",
"SDL_PIXELFORMAT_INDEX4LSB",
"SDL_PIXELFORMAT_INDEX4MSB",
"SDL_PIXELFORMAT_INDEX8",

28
test/testautomation_surface.c
View File

@ -668,6 +668,34 @@ int surface_testOverflow(void *arg)
surface != NULL ? "(success)" : SDL_GetError());
SDL_FreeSurface(surface);
/* SDL_PIXELFORMAT_INDEX2* needs 1 byte per 4 pixels. */
surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 12, 1, 2, 3, SDL_PIXELFORMAT_INDEX2LSB);
SDLTest_AssertCheck(surface != NULL, "12px * 2 bits per px fits in 3 bytes: %s",
surface != NULL ? "(success)" : SDL_GetError());
SDL_FreeSurface(surface);
surface = SDL_CreateRGBSurfaceFrom(buf, 12, 1, 2, 3, 0, 0, 0, 0);
SDLTest_AssertCheck(surface != NULL, "12px * 2 bits per px fits in 3 bytes: %s",
surface != NULL ? "(success)" : SDL_GetError());
SDL_FreeSurface(surface);
surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 13, 1, 2, 3, SDL_PIXELFORMAT_INDEX2LSB);
SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp (%d)", surface ? surface->pitch : 0);
SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
"Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
surface = SDL_CreateRGBSurfaceFrom(buf, 13, 1, 2, 3, 0, 0, 0, 0);
SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
"Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 13, 1, 2, 4, SDL_PIXELFORMAT_INDEX2LSB);
SDLTest_AssertCheck(surface != NULL, "13px * 2 bits per px fits in 4 bytes: %s",
surface != NULL ? "(success)" : SDL_GetError());
SDL_FreeSurface(surface);
surface = SDL_CreateRGBSurfaceFrom(buf, 13, 1, 2, 4, 0, 0, 0, 0);
SDLTest_AssertCheck(surface != NULL, "13px * 2 bits per px fits in 4 bytes: %s",
surface != NULL ? "(success)" : SDL_GetError());
SDL_FreeSurface(surface);
/* SDL_PIXELFORMAT_INDEX1* needs 1 byte per 8 pixels. */
surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 16, 1, 1, 2, SDL_PIXELFORMAT_INDEX1LSB);
SDLTest_AssertCheck(surface != NULL, "16px * 1 bit per px fits in 2 bytes: %s",