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2ba76dbe80
SDL_Surface has been simplified and internal details are no longer in the public structure. The `format` member of SDL_Surface is now an enumerated pixel format value. You can get the full details of the pixel format by calling `SDL_GetPixelFormatDetails(surface->format)`. You can get the palette associated with the surface by calling SDL_GetSurfacePalette(). You can get the clip rectangle by calling SDL_GetSurfaceClipRect(). SDL_PixelFormat has been renamed SDL_PixelFormatDetails and just describes the pixel format, it does not include a palette for indexed pixel types. SDL_PixelFormatEnum has been renamed SDL_PixelFormat and is used instead of Uint32 for API functions that refer to pixel format by enumerated value. SDL_MapRGB(), SDL_MapRGBA(), SDL_GetRGB(), and SDL_GetRGBA() take an optional palette parameter for indexed color lookups.
346 lines
10 KiB
C
346 lines
10 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 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_VIDEO_RENDER_SW
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#include "SDL_draw.h"
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#include "SDL_blendfillrect.h"
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static int SDL_BlendFillRect_RGB555(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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unsigned inva = 0xff - a;
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB555);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB555);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB555);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB555);
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break;
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default:
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FILLRECT(Uint16, DRAW_SETPIXEL_RGB555);
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break;
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}
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return 0;
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}
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static int SDL_BlendFillRect_RGB565(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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unsigned inva = 0xff - a;
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB565);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB565);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB565);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB565);
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break;
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default:
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FILLRECT(Uint16, DRAW_SETPIXEL_RGB565);
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break;
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}
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return 0;
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}
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static int SDL_BlendFillRect_XRGB8888(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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unsigned inva = 0xff - a;
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_XRGB8888);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint32, DRAW_SETPIXEL_ADD_XRGB8888);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint32, DRAW_SETPIXEL_MOD_XRGB8888);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint32, DRAW_SETPIXEL_MUL_XRGB8888);
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break;
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default:
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FILLRECT(Uint32, DRAW_SETPIXEL_XRGB8888);
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break;
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}
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return 0;
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}
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static int SDL_BlendFillRect_ARGB8888(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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unsigned inva = 0xff - a;
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint32, DRAW_SETPIXEL_ADD_ARGB8888);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint32, DRAW_SETPIXEL_MOD_ARGB8888);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint32, DRAW_SETPIXEL_MUL_ARGB8888);
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break;
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default:
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FILLRECT(Uint32, DRAW_SETPIXEL_ARGB8888);
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break;
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}
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return 0;
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}
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static int SDL_BlendFillRect_RGB(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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const SDL_PixelFormatDetails *fmt = dst->internal->format;
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unsigned inva = 0xff - a;
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switch (fmt->bytes_per_pixel) {
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case 2:
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB);
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break;
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default:
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FILLRECT(Uint16, DRAW_SETPIXEL_RGB);
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break;
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}
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return 0;
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case 4:
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGB);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGB);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGB);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint32, DRAW_SETPIXEL_MUL_RGB);
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break;
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default:
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FILLRECT(Uint32, DRAW_SETPIXEL_RGB);
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break;
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}
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return 0;
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default:
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return SDL_Unsupported();
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}
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}
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static int SDL_BlendFillRect_RGBA(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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const SDL_PixelFormatDetails *fmt = dst->internal->format;
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unsigned inva = 0xff - a;
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switch (fmt->bytes_per_pixel) {
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case 4:
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGBA);
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break;
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case SDL_BLENDMODE_ADD:
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FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGBA);
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break;
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case SDL_BLENDMODE_MOD:
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FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGBA);
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break;
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case SDL_BLENDMODE_MUL:
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FILLRECT(Uint32, DRAW_SETPIXEL_MUL_RGBA);
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break;
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default:
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FILLRECT(Uint32, DRAW_SETPIXEL_RGBA);
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break;
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}
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return 0;
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default:
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return SDL_Unsupported();
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}
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}
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int SDL_BlendFillRect(SDL_Surface *dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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SDL_Rect clipped;
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if (!SDL_SurfaceValid(dst)) {
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return SDL_InvalidParamError("SDL_BlendFillRect(): dst");
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}
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/* This function doesn't work on surfaces < 8 bpp */
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if (SDL_BITSPERPIXEL(dst->format) < 8) {
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return SDL_SetError("SDL_BlendFillRect(): Unsupported surface format");
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}
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/* If 'rect' == NULL, then fill the whole surface */
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if (rect) {
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/* Perform clipping */
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if (!SDL_GetRectIntersection(rect, &dst->internal->clip_rect, &clipped)) {
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return 0;
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}
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rect = &clipped;
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} else {
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rect = &dst->internal->clip_rect;
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}
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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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}
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switch (dst->internal->format->bits_per_pixel) {
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case 15:
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switch (dst->internal->format->Rmask) {
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case 0x7C00:
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return SDL_BlendFillRect_RGB555(dst, rect, blendMode, r, g, b, a);
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}
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break;
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case 16:
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switch (dst->internal->format->Rmask) {
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case 0xF800:
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return SDL_BlendFillRect_RGB565(dst, rect, blendMode, r, g, b, a);
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}
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break;
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case 32:
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switch (dst->internal->format->Rmask) {
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case 0x00FF0000:
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if (!dst->internal->format->Amask) {
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return SDL_BlendFillRect_XRGB8888(dst, rect, blendMode, r, g, b, a);
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} else {
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return SDL_BlendFillRect_ARGB8888(dst, rect, blendMode, r, g, b, a);
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}
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/* break; -Wunreachable-code-break */
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}
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break;
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default:
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break;
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}
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if (!dst->internal->format->Amask) {
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return SDL_BlendFillRect_RGB(dst, rect, blendMode, r, g, b, a);
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} else {
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return SDL_BlendFillRect_RGBA(dst, rect, blendMode, r, g, b, a);
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}
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}
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int SDL_BlendFillRects(SDL_Surface *dst, const SDL_Rect *rects, int count,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
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{
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SDL_Rect rect;
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int i;
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int (*func)(SDL_Surface * dst, const SDL_Rect *rect,
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SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
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int status = 0;
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if (!SDL_SurfaceValid(dst)) {
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return SDL_InvalidParamError("SDL_BlendFillRects(): dst");
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}
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/* This function doesn't work on surfaces < 8 bpp */
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if (dst->internal->format->bits_per_pixel < 8) {
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return SDL_SetError("SDL_BlendFillRects(): Unsupported surface format");
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}
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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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}
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/* FIXME: Does this function pointer slow things down significantly? */
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switch (dst->internal->format->bits_per_pixel) {
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case 15:
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switch (dst->internal->format->Rmask) {
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case 0x7C00:
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func = SDL_BlendFillRect_RGB555;
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}
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break;
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case 16:
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switch (dst->internal->format->Rmask) {
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case 0xF800:
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func = SDL_BlendFillRect_RGB565;
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}
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break;
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case 32:
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switch (dst->internal->format->Rmask) {
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case 0x00FF0000:
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if (!dst->internal->format->Amask) {
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func = SDL_BlendFillRect_XRGB8888;
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} else {
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func = SDL_BlendFillRect_ARGB8888;
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}
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break;
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}
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break;
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default:
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break;
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}
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if (!func) {
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if (!dst->internal->format->Amask) {
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func = SDL_BlendFillRect_RGB;
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} else {
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func = SDL_BlendFillRect_RGBA;
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}
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}
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for (i = 0; i < count; ++i) {
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/* Perform clipping */
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if (!SDL_GetRectIntersection(&rects[i], &dst->internal->clip_rect, &rect)) {
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continue;
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}
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status = func(dst, &rect, blendMode, r, g, b, a);
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}
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return status;
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}
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#endif /* SDL_VIDEO_RENDER_SW */
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