diff options
Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_blendpoint.c')
-rw-r--r-- | 3rdparty/SDL2/src/render/software/SDL_blendpoint.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_blendpoint.c b/3rdparty/SDL2/src/render/software/SDL_blendpoint.c new file mode 100644 index 00000000000..fc42dfe767a --- /dev/null +++ b/3rdparty/SDL2/src/render/software/SDL_blendpoint.c @@ -0,0 +1,343 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#if !SDL_RENDER_DISABLED + +#include "SDL_draw.h" +#include "SDL_blendpoint.h" + + +static int +SDL_BlendPoint_RGB555(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + unsigned inva = 0xff - a; + + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY_BLEND_RGB555(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY_ADD_RGB555(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY_MOD_RGB555(x, y); + break; + default: + DRAW_SETPIXELXY_RGB555(x, y); + break; + } + return 0; +} + +static int +SDL_BlendPoint_RGB565(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + unsigned inva = 0xff - a; + + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY_BLEND_RGB565(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY_ADD_RGB565(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY_MOD_RGB565(x, y); + break; + default: + DRAW_SETPIXELXY_RGB565(x, y); + break; + } + return 0; +} + +static int +SDL_BlendPoint_RGB888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + unsigned inva = 0xff - a; + + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY_BLEND_RGB888(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY_ADD_RGB888(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY_MOD_RGB888(x, y); + break; + default: + DRAW_SETPIXELXY_RGB888(x, y); + break; + } + return 0; +} + +static int +SDL_BlendPoint_ARGB8888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, + Uint8 r, Uint8 g, Uint8 b, Uint8 a) +{ + unsigned inva = 0xff - a; + + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY_BLEND_ARGB8888(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY_ADD_ARGB8888(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY_MOD_ARGB8888(x, y); + break; + default: + DRAW_SETPIXELXY_ARGB8888(x, y); + break; + } + return 0; +} + +static int +SDL_BlendPoint_RGB(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + SDL_PixelFormat *fmt = dst->format; + unsigned inva = 0xff - a; + + switch (fmt->BytesPerPixel) { + case 2: + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY2_BLEND_RGB(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY2_ADD_RGB(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY2_MOD_RGB(x, y); + break; + default: + DRAW_SETPIXELXY2_RGB(x, y); + break; + } + return 0; + case 4: + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY4_BLEND_RGB(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY4_ADD_RGB(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY4_MOD_RGB(x, y); + break; + default: + DRAW_SETPIXELXY4_RGB(x, y); + break; + } + return 0; + default: + return SDL_Unsupported(); + } +} + +static int +SDL_BlendPoint_RGBA(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + SDL_PixelFormat *fmt = dst->format; + unsigned inva = 0xff - a; + + switch (fmt->BytesPerPixel) { + case 4: + switch (blendMode) { + case SDL_BLENDMODE_BLEND: + DRAW_SETPIXELXY4_BLEND_RGBA(x, y); + break; + case SDL_BLENDMODE_ADD: + DRAW_SETPIXELXY4_ADD_RGBA(x, y); + break; + case SDL_BLENDMODE_MOD: + DRAW_SETPIXELXY4_MOD_RGBA(x, y); + break; + default: + DRAW_SETPIXELXY4_RGBA(x, y); + break; + } + return 0; + default: + return SDL_Unsupported(); + } +} + +int +SDL_BlendPoint(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, + Uint8 g, Uint8 b, Uint8 a) +{ + if (!dst) { + return SDL_SetError("Passed NULL destination surface"); + } + + /* This function doesn't work on surfaces < 8 bpp */ + if (dst->format->BitsPerPixel < 8) { + return SDL_SetError("SDL_BlendPoint(): Unsupported surface format"); + } + + /* Perform clipping */ + if (x < dst->clip_rect.x || y < dst->clip_rect.y || + x >= (dst->clip_rect.x + dst->clip_rect.w) || + y >= (dst->clip_rect.y + dst->clip_rect.h)) { + return 0; + } + + if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { + r = DRAW_MUL(r, a); + g = DRAW_MUL(g, a); + b = DRAW_MUL(b, a); + } + + switch (dst->format->BitsPerPixel) { + case 15: + switch (dst->format->Rmask) { + case 0x7C00: + return SDL_BlendPoint_RGB555(dst, x, y, blendMode, r, g, b, a); + } + break; + case 16: + switch (dst->format->Rmask) { + case 0xF800: + return SDL_BlendPoint_RGB565(dst, x, y, blendMode, r, g, b, a); + } + break; + case 32: + switch (dst->format->Rmask) { + case 0x00FF0000: + if (!dst->format->Amask) { + return SDL_BlendPoint_RGB888(dst, x, y, blendMode, r, g, b, + a); + } else { + return SDL_BlendPoint_ARGB8888(dst, x, y, blendMode, r, g, b, + a); + } + break; + } + break; + default: + break; + } + + if (!dst->format->Amask) { + return SDL_BlendPoint_RGB(dst, x, y, blendMode, r, g, b, a); + } else { + return SDL_BlendPoint_RGBA(dst, x, y, blendMode, r, g, b, a); + } +} + +int +SDL_BlendPoints(SDL_Surface * dst, const SDL_Point * points, int count, + SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) +{ + int minx, miny; + int maxx, maxy; + int i; + int x, y; + int (*func)(SDL_Surface * dst, int x, int y, + SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL; + int status = 0; + + if (!dst) { + return SDL_SetError("Passed NULL destination surface"); + } + + /* This function doesn't work on surfaces < 8 bpp */ + if (dst->format->BitsPerPixel < 8) { + return SDL_SetError("SDL_BlendPoints(): Unsupported surface format"); + } + + if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { + r = DRAW_MUL(r, a); + g = DRAW_MUL(g, a); + b = DRAW_MUL(b, a); + } + + /* FIXME: Does this function pointer slow things down significantly? */ + switch (dst->format->BitsPerPixel) { + case 15: + switch (dst->format->Rmask) { + case 0x7C00: + func = SDL_BlendPoint_RGB555; + break; + } + break; + case 16: + switch (dst->format->Rmask) { + case 0xF800: + func = SDL_BlendPoint_RGB565; + break; + } + break; + case 32: + switch (dst->format->Rmask) { + case 0x00FF0000: + if (!dst->format->Amask) { + func = SDL_BlendPoint_RGB888; + } else { + func = SDL_BlendPoint_ARGB8888; + } + break; + } + break; + default: + break; + } + + if (!func) { + if (!dst->format->Amask) { + func = SDL_BlendPoint_RGB; + } else { + func = SDL_BlendPoint_RGBA; + } + } + + minx = dst->clip_rect.x; + maxx = dst->clip_rect.x + dst->clip_rect.w - 1; + miny = dst->clip_rect.y; + maxy = dst->clip_rect.y + dst->clip_rect.h - 1; + + for (i = 0; i < count; ++i) { + x = points[i].x; + y = points[i].y; + + if (x < minx || x > maxx || y < miny || y > maxy) { + continue; + } + status = func(dst, x, y, blendMode, r, g, b, a); + } + return status; +} + +#endif /* !SDL_RENDER_DISABLED */ + +/* vi: set ts=4 sw=4 expandtab: */ |