Mercurial > sdl-ios-xcode
view src/video/SDL_blendline.c @ 5080:6d94060d16a9
Fixed bug #1011
Daniel Ellis 2010-06-25 15:20:31 PDT
SDL based applications sometimes display the wrong application name in the
Sound Preferences dialog when using pulseaudio.
I can see from the code that the SDL pulse module is initiating a new pulse
audio context and passing an application name using the function
get_progname().
The get_progname() function returns the name of the current process. However,
the process name is often not a suitable name to use. For example, the OpenShot
video editor is a python application, and so "python" is displayed in the Sound
Preferences window (see Bug #596504), when it should be displaying "OpenShot".
PulseAudio allows applications to specify the application name, either at the
time the context is created (as SDL does currently), or by special environment
variables (see http://www.pulseaudio.org/wiki/ApplicationProperties). If no
name is specified, then pulseaudio will determine the name based on the
process.
If you specify the application name when initiating the pulseaudio context,
then that will override any application name specified using an environment
variable.
As libsdl is a library, I believe the solution is for libsdl to not specify any
application name when initiating a pulseaudio context, which will enable
applications to specify the application name using environment variables. In
the case that the applications do not specify anything, pulseaudio will fall
back to using the process name anyway.
The attached patch removes the get_progname() function and passes NULL as the
application name when creating the pulseaudio context, which fixes the issue.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 23 Jan 2011 21:55:04 -0800 |
| parents | f7b03b6838cb |
| children | aa8888658021 |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #include "SDL_draw.h" static void SDL_BlendLine_RGB2(SDL_Surface * dst, int x1, int y1, int x2, int y2, int 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, int 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_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, int 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_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, int 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, int 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, int 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_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, int 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_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, int 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, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { BlendLineFunc func; if (!dst) { SDL_SetError("SDL_BlendLine(): Passed NULL destination surface"); return -1; } func = SDL_CalculateBlendLineFunc(dst->format); if (!func) { SDL_SetError("SDL_BlendLine(): Unsupported surface format"); return -1; } /* 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, int 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) { SDL_SetError("SDL_BlendLines(): Passed NULL destination surface"); return -1; } func = SDL_CalculateBlendLineFunc(dst->format); if (!func) { SDL_SetError("SDL_BlendLines(): Unsupported surface format"); return -1; } 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; } /* vi: set ts=4 sw=4 expandtab: */