Making the API simpler, moved the surface drawing functions to the software renderer.
--HG-- rename : src/video/SDL_blendline.c => src/render/software/SDL_blendline.c rename : src/video/SDL_blendpoint.c => src/render/software/SDL_blendpoint.c rename : src/video/SDL_draw.h => src/render/software/SDL_draw.h rename : src/video/SDL_drawline.c => src/render/software/SDL_drawline.c rename : src/video/SDL_drawpoint.c => src/render/software/SDL_drawpoint.c
This commit is contained in:
Sam Lantinga
parent
348ea88682
commit
c1295241c6
17 changed files with 106 additions and 457 deletions
325
src/render/software/SDL_blendpoint.c
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325
src/render/software/SDL_blendpoint.c
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_draw.h"
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#include "SDL_blendpoint.h"
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static int
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SDL_BlendPoint_RGB555(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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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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DRAW_SETPIXELXY_BLEND_RGB555(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY_ADD_RGB555(x, y);
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break;
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default:
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DRAW_SETPIXELXY_RGB555(x, y);
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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
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SDL_BlendPoint_RGB565(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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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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DRAW_SETPIXELXY_BLEND_RGB565(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY_ADD_RGB565(x, y);
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break;
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default:
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DRAW_SETPIXELXY_RGB565(x, y);
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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
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SDL_BlendPoint_RGB888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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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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DRAW_SETPIXELXY_BLEND_RGB888(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY_ADD_RGB888(x, y);
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break;
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default:
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DRAW_SETPIXELXY_RGB888(x, y);
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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
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SDL_BlendPoint_ARGB8888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode,
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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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DRAW_SETPIXELXY_BLEND_ARGB8888(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY_ADD_ARGB8888(x, y);
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break;
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default:
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DRAW_SETPIXELXY_ARGB8888(x, y);
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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
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SDL_BlendPoint_RGB(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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Uint8 g, Uint8 b, Uint8 a)
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{
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SDL_PixelFormat *fmt = dst->format;
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unsigned inva = 0xff - a;
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switch (fmt->BytesPerPixel) {
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case 2:
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DRAW_SETPIXELXY2_BLEND_RGB(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY2_ADD_RGB(x, y);
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break;
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default:
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DRAW_SETPIXELXY2_RGB(x, y);
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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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DRAW_SETPIXELXY4_BLEND_RGB(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY4_ADD_RGB(x, y);
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break;
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default:
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DRAW_SETPIXELXY4_RGB(x, y);
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break;
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}
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return 0;
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default:
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SDL_Unsupported();
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return -1;
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}
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}
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static int
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SDL_BlendPoint_RGBA(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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Uint8 g, Uint8 b, Uint8 a)
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{
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SDL_PixelFormat *fmt = dst->format;
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unsigned inva = 0xff - a;
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switch (fmt->BytesPerPixel) {
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case 4:
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switch (blendMode) {
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case SDL_BLENDMODE_BLEND:
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DRAW_SETPIXELXY4_BLEND_RGBA(x, y);
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break;
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case SDL_BLENDMODE_ADD:
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DRAW_SETPIXELXY4_ADD_RGBA(x, y);
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break;
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default:
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DRAW_SETPIXELXY4_RGBA(x, y);
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break;
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}
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return 0;
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default:
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SDL_Unsupported();
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return -1;
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}
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}
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int
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SDL_BlendPoint(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
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Uint8 g, Uint8 b, Uint8 a)
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{
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if (!dst) {
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SDL_SetError("Passed NULL destination surface");
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return -1;
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}
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/* This function doesn't work on surfaces < 8 bpp */
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if (dst->format->BitsPerPixel < 8) {
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SDL_SetError("SDL_BlendPoint(): Unsupported surface format");
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return -1;
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}
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/* Perform clipping */
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if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
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x >= (dst->clip_rect.x + dst->clip_rect.w) ||
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y >= (dst->clip_rect.y + dst->clip_rect.h)) {
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return 0;
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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->format->BitsPerPixel) {
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case 15:
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switch (dst->format->Rmask) {
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case 0x7C00:
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return SDL_BlendPoint_RGB555(dst, x, y, 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->format->Rmask) {
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case 0xF800:
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return SDL_BlendPoint_RGB565(dst, x, y, 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->format->Rmask) {
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case 0x00FF0000:
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if (!dst->format->Amask) {
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return SDL_BlendPoint_RGB888(dst, x, y, blendMode, r, g, b,
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a);
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} else {
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return SDL_BlendPoint_ARGB8888(dst, x, y, blendMode, r, g, b,
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a);
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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 (!dst->format->Amask) {
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return SDL_BlendPoint_RGB(dst, x, y, blendMode, r, g, b, a);
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} else {
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return SDL_BlendPoint_RGBA(dst, x, y, blendMode, r, g, b, a);
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}
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}
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int
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SDL_BlendPoints(SDL_Surface * dst, const SDL_Point * points, 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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int minx, miny;
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int maxx, maxy;
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int i;
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int x, y;
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int (*func)(SDL_Surface * dst, int x, int y,
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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 (!dst) {
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SDL_SetError("Passed NULL destination surface");
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return -1;
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}
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/* This function doesn't work on surfaces < 8 bpp */
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if (dst->format->BitsPerPixel < 8) {
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SDL_SetError("SDL_BlendPoints(): Unsupported surface format");
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return (-1);
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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->format->BitsPerPixel) {
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case 15:
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switch (dst->format->Rmask) {
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case 0x7C00:
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func = SDL_BlendPoint_RGB555;
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break;
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}
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break;
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case 16:
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switch (dst->format->Rmask) {
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case 0xF800:
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func = SDL_BlendPoint_RGB565;
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break;
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}
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break;
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case 32:
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switch (dst->format->Rmask) {
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case 0x00FF0000:
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if (!dst->format->Amask) {
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func = SDL_BlendPoint_RGB888;
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} else {
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func = SDL_BlendPoint_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->format->Amask) {
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func = SDL_BlendPoint_RGB;
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} else {
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func = SDL_BlendPoint_RGBA;
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}
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}
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minx = dst->clip_rect.x;
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maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
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miny = dst->clip_rect.y;
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maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
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for (i = 0; i < count; ++i) {
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x = points[i].x;
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y = points[i].y;
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if (x < minx || x > maxx || y < miny || y > maxy) {
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continue;
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}
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status = func(dst, x, y, blendMode, r, g, b, a);
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}
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return status;
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}
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/* vi: set ts=4 sw=4 expandtab: */
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