mirror of
https://github.com/encounter/SDL.git
synced 2025-05-22 07:11:23 +00:00
70438be272
WinRT apps can set a default, preferred orientation via a .appxmanifest file. SDL was overriding this on app startup, and making the app use all possible orientations (landscape and portrait). Thanks to Eric Wing for the heads up on this!
778 lines
24 KiB
C
778 lines
24 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if !SDL_RENDER_DISABLED
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#include "SDL_draw.h"
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#include "SDL_blendline.h"
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#include "SDL_blendpoint.h"
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static void
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SDL_BlendLine_RGB2(SDL_Surface * dst, int x1, int y1, int x2, int y2,
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SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
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SDL_bool draw_end)
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{
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const SDL_PixelFormat *fmt = dst->format;
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unsigned r, g, b, a, inva;
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if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
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r = DRAW_MUL(_r, _a);
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g = DRAW_MUL(_g, _a);
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b = DRAW_MUL(_b, _a);
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a = _a;
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} else {
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r = _r;
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g = _g;
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b = _b;
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a = _a;
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}
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inva = (a ^ 0xff);
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if (y1 == y2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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HLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else if (x1 == x2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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VLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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DLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
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draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_ADD_RGB,
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draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_MOD_RGB,
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draw_end);
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break;
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default:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
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draw_end);
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break;
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}
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}
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}
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static void
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SDL_BlendLine_RGB555(SDL_Surface * dst, int x1, int y1, int x2, int y2,
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SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
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SDL_bool draw_end)
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{
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unsigned r, g, b, a, inva;
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if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
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r = DRAW_MUL(_r, _a);
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g = DRAW_MUL(_g, _a);
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b = DRAW_MUL(_b, _a);
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a = _a;
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} else {
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r = _r;
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g = _g;
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b = _b;
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a = _a;
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}
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inva = (a ^ 0xff);
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if (y1 == y2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
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break;
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default:
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HLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
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break;
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}
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} else if (x1 == x2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
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break;
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default:
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VLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
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break;
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}
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} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
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break;
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default:
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DLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
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break;
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}
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} else {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
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draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_ADD_RGB555,
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draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_MOD_RGB555,
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draw_end);
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break;
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default:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
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draw_end);
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break;
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}
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}
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}
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static void
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SDL_BlendLine_RGB565(SDL_Surface * dst, int x1, int y1, int x2, int y2,
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SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
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SDL_bool draw_end)
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{
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unsigned r, g, b, a, inva;
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if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
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r = DRAW_MUL(_r, _a);
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g = DRAW_MUL(_g, _a);
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b = DRAW_MUL(_b, _a);
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a = _a;
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} else {
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r = _r;
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g = _g;
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b = _b;
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a = _a;
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}
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inva = (a ^ 0xff);
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if (y1 == y2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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HLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
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break;
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default:
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HLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
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break;
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}
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} else if (x1 == x2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
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break;
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default:
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VLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
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break;
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}
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} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
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break;
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default:
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DLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
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break;
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}
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} else {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
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draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_ADD_RGB565,
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draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_MOD_RGB565,
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draw_end);
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break;
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default:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
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draw_end);
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break;
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}
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}
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}
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static void
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SDL_BlendLine_RGB4(SDL_Surface * dst, int x1, int y1, int x2, int y2,
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SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
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SDL_bool draw_end)
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{
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const SDL_PixelFormat *fmt = dst->format;
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unsigned r, g, b, a, inva;
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if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
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r = DRAW_MUL(_r, _a);
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g = DRAW_MUL(_g, _a);
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b = DRAW_MUL(_b, _a);
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a = _a;
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} else {
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r = _r;
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g = _g;
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b = _b;
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a = _a;
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}
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inva = (a ^ 0xff);
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if (y1 == y2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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HLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else if (x1 == x2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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VLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
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break;
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default:
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DLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
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break;
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}
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} else {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
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draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_ADD_RGB,
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draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_MOD_RGB,
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draw_end);
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break;
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default:
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AALINE(x1, y1, x2, y2,
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DRAW_SETPIXELXY4_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
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draw_end);
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break;
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}
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}
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}
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static void
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SDL_BlendLine_RGBA4(SDL_Surface * dst, int x1, int y1, int x2, int y2,
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SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
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SDL_bool draw_end)
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{
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const SDL_PixelFormat *fmt = dst->format;
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unsigned r, g, b, a, inva;
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if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
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r = DRAW_MUL(_r, _a);
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g = DRAW_MUL(_g, _a);
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b = DRAW_MUL(_b, _a);
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a = _a;
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} else {
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r = _r;
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g = _g;
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b = _b;
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a = _a;
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}
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inva = (a ^ 0xff);
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if (y1 == y2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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HLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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HLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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HLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
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break;
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default:
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HLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
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break;
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}
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} else if (x1 == x2) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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VLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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VLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
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break;
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default:
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VLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
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break;
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}
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} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_ADD:
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DLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
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break;
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case SDL_BLENDMODE_MOD:
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DLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
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break;
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default:
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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: */
|