diff options
Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_blendline.c')
-rw-r--r-- | 3rdparty/SDL2/src/render/software/SDL_blendline.c | 777 |
1 files changed, 0 insertions, 777 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_blendline.c b/3rdparty/SDL2/src/render/software/SDL_blendline.c deleted file mode 100644 index ef0d585316c..00000000000 --- a/3rdparty/SDL2/src/render/software/SDL_blendline.c +++ /dev/null @@ -1,777 +0,0 @@ -/* - 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_blendline.h" -#include "SDL_blendpoint.h" - - -static void -SDL_BlendLine_RGB2(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - const SDL_PixelFormat *fmt = dst->format; - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - HLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - VLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - DLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_BLEND_RGB, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_ADD_RGB, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_MOD_RGB, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY2_BLEND_RGB, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_RGB555(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end); - break; - default: - HLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end); - break; - default: - VLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end); - break; - default: - DLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_BLEND_RGB555, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_ADD_RGB555, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_MOD_RGB555, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_RGB555, DRAW_SETPIXELXY_BLEND_RGB555, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_RGB565(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end); - break; - default: - HLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end); - break; - default: - VLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end); - break; - default: - DLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_BLEND_RGB565, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_ADD_RGB565, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_MOD_RGB565, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_RGB565, DRAW_SETPIXELXY_BLEND_RGB565, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_RGB4(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - const SDL_PixelFormat *fmt = dst->format; - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - HLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - VLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end); - break; - default: - DLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_BLEND_RGB, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_ADD_RGB, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_MOD_RGB, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_RGB, DRAW_SETPIXELXY4_BLEND_RGB, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_RGBA4(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - const SDL_PixelFormat *fmt = dst->format; - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end); - break; - default: - HLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end); - break; - default: - VLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end); - break; - default: - DLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_BLEND_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_ADD_RGBA, DRAW_SETPIXELXY4_ADD_RGBA, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_MOD_RGBA, DRAW_SETPIXELXY4_MOD_RGBA, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY4_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_RGB888(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end); - break; - default: - HLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end); - break; - default: - VLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end); - break; - default: - DLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_BLEND_RGB888, DRAW_SETPIXELXY_BLEND_RGB888, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_ADD_RGB888, DRAW_SETPIXELXY_ADD_RGB888, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_MOD_RGB888, DRAW_SETPIXELXY_MOD_RGB888, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_RGB888, DRAW_SETPIXELXY_BLEND_RGB888, - draw_end); - break; - } - } -} - -static void -SDL_BlendLine_ARGB8888(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a, - SDL_bool draw_end) -{ - unsigned r, g, b, a, inva; - - if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) { - r = DRAW_MUL(_r, _a); - g = DRAW_MUL(_g, _a); - b = DRAW_MUL(_b, _a); - a = _a; - } else { - r = _r; - g = _g; - b = _b; - a = _a; - } - inva = (a ^ 0xff); - - if (y1 == y2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - HLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_ADD: - HLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_MOD: - HLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end); - break; - default: - HLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end); - break; - } - } else if (x1 == x2) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - VLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_ADD: - VLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_MOD: - VLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end); - break; - default: - VLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end); - break; - } - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - DLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_ADD: - DLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end); - break; - case SDL_BLENDMODE_MOD: - DLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end); - break; - default: - DLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end); - break; - } - } else { - switch (blendMode) { - case SDL_BLENDMODE_BLEND: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_BLEND_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888, - draw_end); - break; - case SDL_BLENDMODE_ADD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_ADD_ARGB8888, DRAW_SETPIXELXY_ADD_ARGB8888, - draw_end); - break; - case SDL_BLENDMODE_MOD: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_MOD_ARGB8888, DRAW_SETPIXELXY_MOD_ARGB8888, - draw_end); - break; - default: - AALINE(x1, y1, x2, y2, - DRAW_SETPIXELXY_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888, - draw_end); - break; - } - } -} - -typedef void (*BlendLineFunc) (SDL_Surface * dst, - int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, - Uint8 r, Uint8 g, Uint8 b, Uint8 a, - SDL_bool draw_end); - -static BlendLineFunc -SDL_CalculateBlendLineFunc(const SDL_PixelFormat * fmt) -{ - switch (fmt->BytesPerPixel) { - case 2: - if (fmt->Rmask == 0x7C00) { - return SDL_BlendLine_RGB555; - } else if (fmt->Rmask == 0xF800) { - return SDL_BlendLine_RGB565; - } else { - return SDL_BlendLine_RGB2; - } - break; - case 4: - if (fmt->Rmask == 0x00FF0000) { - if (fmt->Amask) { - return SDL_BlendLine_ARGB8888; - } else { - return SDL_BlendLine_RGB888; - } - } else { - if (fmt->Amask) { - return SDL_BlendLine_RGBA4; - } else { - return SDL_BlendLine_RGB4; - } - } - } - return NULL; -} - -int -SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2, - SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) -{ - BlendLineFunc func; - - if (!dst) { - return SDL_SetError("SDL_BlendLine(): Passed NULL destination surface"); - } - - func = SDL_CalculateBlendLineFunc(dst->format); - if (!func) { - return SDL_SetError("SDL_BlendLine(): Unsupported surface format"); - } - - /* Perform clipping */ - /* FIXME: We don't actually want to clip, as it may change line slope */ - if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) { - return 0; - } - - func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, SDL_TRUE); - return 0; -} - -int -SDL_BlendLines(SDL_Surface * dst, const SDL_Point * points, int count, - SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) -{ - int i; - int x1, y1; - int x2, y2; - SDL_bool draw_end; - BlendLineFunc func; - - if (!dst) { - return SDL_SetError("SDL_BlendLines(): Passed NULL destination surface"); - } - - func = SDL_CalculateBlendLineFunc(dst->format); - if (!func) { - return SDL_SetError("SDL_BlendLines(): Unsupported surface format"); - } - - for (i = 1; i < count; ++i) { - x1 = points[i-1].x; - y1 = points[i-1].y; - x2 = points[i].x; - y2 = points[i].y; - - /* Perform clipping */ - /* FIXME: We don't actually want to clip, as it may change line slope */ - if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) { - continue; - } - - /* Draw the end if it was clipped */ - draw_end = (x2 != points[i].x || y2 != points[i].y); - - func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, draw_end); - } - if (points[0].x != points[count-1].x || points[0].y != points[count-1].y) { - SDL_BlendPoint(dst, points[count-1].x, points[count-1].y, - blendMode, r, g, b, a); - } - return 0; -} - -#endif /* !SDL_RENDER_DISABLED */ - -/* vi: set ts=4 sw=4 expandtab: */ |