| /* | |
| Simple DirectMedia Layer | |
| Copyright (C) 1997-2023 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_VIDEO_RENDER_SW && !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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY2_MUL_RGB, DRAW_SETPIXELXY2_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY_MUL_RGB555, DRAW_SETPIXELXY_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint16, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY_MUL_RGB565, DRAW_SETPIXELXY_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY4_MUL_RGB, DRAW_SETPIXELXY4_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY4_MUL_RGBA, DRAW_SETPIXELXY4_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY_MUL_RGB888, DRAW_SETPIXELXY_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| HLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| VLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| DLINE(Uint32, DRAW_SETPIXEL_MUL_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; | |
| case SDL_BLENDMODE_MUL: | |
| AALINE(x1, y1, x2, y2, | |
| DRAW_SETPIXELXY_MUL_ARGB8888, DRAW_SETPIXELXY_MUL_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; -Wunreachable-code-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_InvalidParamError("SDL_BlendLine(): dst"); | |
| } | |
| 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_VIDEO_RENDER_SW && !SDL_RENDER_DISABLED */ | |
| /* vi: set ts=4 sw=4 expandtab: */ |