--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/SDL_blendfillrect.c	Fri Dec 18 07:03:09 2009 +0000
@@ -0,0 +1,357 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2009 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_video.h"
+#include "SDL_draw.h"
+
+static int
+SDL_BlendFillRect_RGB555(SDL_Surface * dst, const SDL_Rect * rect,
+                         int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    unsigned inva = 0xff - a;
+
+    switch (blendMode) {
+    case SDL_BLENDMODE_BLEND:
+        FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB555);
+        break;
+    case SDL_BLENDMODE_ADD:
+        FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB555);
+        break;
+    case SDL_BLENDMODE_MOD:
+        FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB555);
+        break;
+    default:
+        FILLRECT(Uint16, DRAW_SETPIXEL_RGB555);
+        break;
+    }
+    return 0;
+}
+
+static int
+SDL_BlendFillRect_RGB565(SDL_Surface * dst, const SDL_Rect * rect,
+                         int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    unsigned inva = 0xff - a;
+
+    switch (blendMode) {
+    case SDL_BLENDMODE_BLEND:
+        FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB565);
+        break;
+    case SDL_BLENDMODE_ADD:
+        FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB565);
+        break;
+    case SDL_BLENDMODE_MOD:
+        FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB565);
+        break;
+    default:
+        FILLRECT(Uint16, DRAW_SETPIXEL_RGB565);
+        break;
+    }
+    return 0;
+}
+
+static int
+SDL_BlendFillRect_RGB888(SDL_Surface * dst, const SDL_Rect * rect,
+                         int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    unsigned inva = 0xff - a;
+
+    switch (blendMode) {
+    case SDL_BLENDMODE_BLEND:
+        FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGB888);
+        break;
+    case SDL_BLENDMODE_ADD:
+        FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGB888);
+        break;
+    case SDL_BLENDMODE_MOD:
+        FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGB888);
+        break;
+    default:
+        FILLRECT(Uint32, DRAW_SETPIXEL_RGB888);
+        break;
+    }
+    return 0;
+}
+
+static int
+SDL_BlendFillRect_ARGB8888(SDL_Surface * dst, const SDL_Rect * rect,
+                           int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    unsigned inva = 0xff - a;
+
+    switch (blendMode) {
+    case SDL_BLENDMODE_BLEND:
+        FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888);
+        break;
+    case SDL_BLENDMODE_ADD:
+        FILLRECT(Uint32, DRAW_SETPIXEL_ADD_ARGB8888);
+        break;
+    case SDL_BLENDMODE_MOD:
+        FILLRECT(Uint32, DRAW_SETPIXEL_MOD_ARGB8888);
+        break;
+    default:
+        FILLRECT(Uint32, DRAW_SETPIXEL_ARGB8888);
+        break;
+    }
+    return 0;
+}
+
+static int
+SDL_BlendFillRect_RGB(SDL_Surface * dst, const SDL_Rect * rect,
+                      int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    SDL_PixelFormat *fmt = dst->format;
+    unsigned inva = 0xff - a;
+
+    switch (fmt->BytesPerPixel) {
+    case 2:
+        switch (blendMode) {
+        case SDL_BLENDMODE_BLEND:
+            FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB);
+            break;
+        case SDL_BLENDMODE_ADD:
+            FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB);
+            break;
+        case SDL_BLENDMODE_MOD:
+            FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB);
+            break;
+        default:
+            FILLRECT(Uint16, DRAW_SETPIXEL_RGB);
+            break;
+        }
+        return 0;
+    case 4:
+        switch (blendMode) {
+        case SDL_BLENDMODE_BLEND:
+            FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGB);
+            break;
+        case SDL_BLENDMODE_ADD:
+            FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGB);
+            break;
+        case SDL_BLENDMODE_MOD:
+            FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGB);
+            break;
+        default:
+            FILLRECT(Uint32, DRAW_SETPIXEL_RGB);
+            break;
+        }
+        return 0;
+    default:
+        SDL_Unsupported();
+        return -1;
+    }
+}
+
+static int
+SDL_BlendFillRect_RGBA(SDL_Surface * dst, const SDL_Rect * rect,
+                       int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    SDL_PixelFormat *fmt = dst->format;
+    unsigned inva = 0xff - a;
+
+    switch (fmt->BytesPerPixel) {
+    case 4:
+        switch (blendMode) {
+        case SDL_BLENDMODE_BLEND:
+            FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGBA);
+            break;
+        case SDL_BLENDMODE_ADD:
+            FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGBA);
+            break;
+        case SDL_BLENDMODE_MOD:
+            FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGBA);
+            break;
+        default:
+            FILLRECT(Uint32, DRAW_SETPIXEL_RGBA);
+            break;
+        }
+        return 0;
+    default:
+        SDL_Unsupported();
+        return -1;
+    }
+}
+
+int
+SDL_BlendFillRect(SDL_Surface * dst, const SDL_Rect * rect,
+                  int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    SDL_Rect clipped;
+
+    if (!dst) {
+        SDL_SetError("Passed NULL destination surface");
+        return -1;
+    }
+
+    if (blendMode < SDL_BLENDMODE_BLEND) {
+        Uint32 color = SDL_MapRGBA(dst->format, r, g, b, a);
+        return SDL_FillRect(dst, rect, color);
+    }
+
+    /* This function doesn't work on surfaces < 8 bpp */
+    if (dst->format->BitsPerPixel < 8) {
+        SDL_SetError("SDL_BlendFillRect(): Unsupported surface format");
+        return -1;
+    }
+
+    /* If 'rect' == NULL, then fill the whole surface */
+    if (rect) {
+        /* Perform clipping */
+        if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
+            return 0;
+        }
+        rect = &clipped;
+    } else {
+        rect = &dst->clip_rect;
+    }
+
+    if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
+        r = DRAW_MUL(r, a);
+        g = DRAW_MUL(g, a);
+        b = DRAW_MUL(b, a);
+    }
+
+    switch (dst->format->BitsPerPixel) {
+    case 15:
+        switch (dst->format->Rmask) {
+        case 0x7C00:
+            return SDL_BlendFillRect_RGB555(dst, rect, blendMode, r, g, b, a);
+        }
+        break;
+    case 16:
+        switch (dst->format->Rmask) {
+        case 0xF800:
+            return SDL_BlendFillRect_RGB565(dst, rect, blendMode, r, g, b, a);
+        }
+        break;
+    case 32:
+        switch (dst->format->Rmask) {
+        case 0x00FF0000:
+            if (!dst->format->Amask) {
+                return SDL_BlendFillRect_RGB888(dst, rect, blendMode, r, g, b, a);
+            } else {
+                return SDL_BlendFillRect_ARGB8888(dst, rect, blendMode, r, g, b, a);
+            }
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+
+    if (!dst->format->Amask) {
+        return SDL_BlendFillRect_RGB(dst, rect, blendMode, r, g, b, a);
+    } else {
+        return SDL_BlendFillRect_RGBA(dst, rect, blendMode, r, g, b, a);
+    }
+}
+
+int
+SDL_BlendFillRects(SDL_Surface * dst, const SDL_Rect ** rects, int count,
+                   int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+    SDL_Rect clipped;
+    int i;
+    int (*func)(SDL_Surface * dst, const SDL_Rect * rect,
+                int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
+    int status = 0;
+
+    if (!dst) {
+        SDL_SetError("Passed NULL destination surface");
+        return -1;
+    }
+
+    if (blendMode < SDL_BLENDMODE_BLEND) {
+        Uint32 color = SDL_MapRGBA(dst->format, r, g, b, a);
+        return SDL_FillRects(dst, rects, color);
+    }
+
+    /* This function doesn't work on surfaces < 8 bpp */
+    if (dst->format->BitsPerPixel < 8) {
+        SDL_SetError("SDL_BlendFillRects(): Unsupported surface format");
+        return -1;
+    }
+
+    if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
+        r = DRAW_MUL(r, a);
+        g = DRAW_MUL(g, a);
+        b = DRAW_MUL(b, a);
+    }
+
+    /* FIXME: Does this function pointer slow things down significantly? */
+    switch (dst->format->BitsPerPixel) {
+    case 15:
+        switch (dst->format->Rmask) {
+        case 0x7C00:
+            func = SDL_BlendFillRect_RGB555;
+        }
+        break;
+    case 16:
+        switch (dst->format->Rmask) {
+        case 0xF800:
+            func = SDL_BlendFillRect_RGB565;
+        }
+        break;
+    case 32:
+        switch (dst->format->Rmask) {
+        case 0x00FF0000:
+            if (!dst->format->Amask) {
+                func = SDL_BlendFillRect_RGB888;
+            } else {
+                func = SDL_BlendFillRect_ARGB8888;
+            }
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+
+    if (!func) {
+        if (!dst->format->Amask) {
+            func = SDL_BlendFillRect_RGB;
+        } else {
+            func = SDL_BlendFillRect_RGBA;
+        }
+    }
+
+    for (i = 0; i < count; ++i) {
+        const SDL_Rect * rect = rects[i];
+
+        /* If 'rect' == NULL, then fill the whole surface */
+        if (rect) {
+            /* Perform clipping */
+            if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
+                continue;
+            }
+            rect = &clipped;
+        } else {
+            rect = &dst->clip_rect;
+        }
+
+        status = func(dst, rect, blendMode, r, g, b, a);
+    }
+    return status;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */