| /* |
| 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 == NULL) { |
| return SDL_InvalidParamError("SDL_BlendLine(): dst"); |
| } |
| |
| func = SDL_CalculateBlendLineFunc(dst->format); |
| if (func == NULL) { |
| 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 == NULL) { |
| return SDL_SetError("SDL_BlendLines(): Passed NULL destination surface"); |
| } |
| |
| func = SDL_CalculateBlendLineFunc(dst->format); |
| if (func == NULL) { |
| 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: */ |
