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Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_blendpoint.c')
-rw-r--r--3rdparty/SDL2/src/render/software/SDL_blendpoint.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_blendpoint.c b/3rdparty/SDL2/src/render/software/SDL_blendpoint.c
new file mode 100644
index 00000000000..fc42dfe767a
--- /dev/null
+++ b/3rdparty/SDL2/src/render/software/SDL_blendpoint.c
@@ -0,0 +1,343 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if !SDL_RENDER_DISABLED
+
+#include "SDL_draw.h"
+#include "SDL_blendpoint.h"
+
+
+static int
+SDL_BlendPoint_RGB555(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
+ Uint8 g, Uint8 b, Uint8 a)
+{
+ unsigned inva = 0xff - a;
+
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DRAW_SETPIXELXY_BLEND_RGB555(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY_ADD_RGB555(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY_MOD_RGB555(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY_RGB555(x, y);
+ break;
+ }
+ return 0;
+}
+
+static int
+SDL_BlendPoint_RGB565(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
+ Uint8 g, Uint8 b, Uint8 a)
+{
+ unsigned inva = 0xff - a;
+
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DRAW_SETPIXELXY_BLEND_RGB565(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY_ADD_RGB565(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY_MOD_RGB565(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY_RGB565(x, y);
+ break;
+ }
+ return 0;
+}
+
+static int
+SDL_BlendPoint_RGB888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
+ Uint8 g, Uint8 b, Uint8 a)
+{
+ unsigned inva = 0xff - a;
+
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DRAW_SETPIXELXY_BLEND_RGB888(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY_ADD_RGB888(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY_MOD_RGB888(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY_RGB888(x, y);
+ break;
+ }
+ return 0;
+}
+
+static int
+SDL_BlendPoint_ARGB8888(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode,
+ Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+ unsigned inva = 0xff - a;
+
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DRAW_SETPIXELXY_BLEND_ARGB8888(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY_ADD_ARGB8888(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY_MOD_ARGB8888(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY_ARGB8888(x, y);
+ break;
+ }
+ return 0;
+}
+
+static int
+SDL_BlendPoint_RGB(SDL_Surface * dst, int x, int y, SDL_BlendMode 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:
+ DRAW_SETPIXELXY2_BLEND_RGB(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY2_ADD_RGB(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY2_MOD_RGB(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY2_RGB(x, y);
+ break;
+ }
+ return 0;
+ case 4:
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DRAW_SETPIXELXY4_BLEND_RGB(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY4_ADD_RGB(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY4_MOD_RGB(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY4_RGB(x, y);
+ break;
+ }
+ return 0;
+ default:
+ return SDL_Unsupported();
+ }
+}
+
+static int
+SDL_BlendPoint_RGBA(SDL_Surface * dst, int x, int y, SDL_BlendMode 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:
+ DRAW_SETPIXELXY4_BLEND_RGBA(x, y);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DRAW_SETPIXELXY4_ADD_RGBA(x, y);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DRAW_SETPIXELXY4_MOD_RGBA(x, y);
+ break;
+ default:
+ DRAW_SETPIXELXY4_RGBA(x, y);
+ break;
+ }
+ return 0;
+ default:
+ return SDL_Unsupported();
+ }
+}
+
+int
+SDL_BlendPoint(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
+ Uint8 g, Uint8 b, Uint8 a)
+{
+ if (!dst) {
+ return SDL_SetError("Passed NULL destination surface");
+ }
+
+ /* This function doesn't work on surfaces < 8 bpp */
+ if (dst->format->BitsPerPixel < 8) {
+ return SDL_SetError("SDL_BlendPoint(): Unsupported surface format");
+ }
+
+ /* Perform clipping */
+ if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
+ x >= (dst->clip_rect.x + dst->clip_rect.w) ||
+ y >= (dst->clip_rect.y + dst->clip_rect.h)) {
+ return 0;
+ }
+
+ 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_BlendPoint_RGB555(dst, x, y, blendMode, r, g, b, a);
+ }
+ break;
+ case 16:
+ switch (dst->format->Rmask) {
+ case 0xF800:
+ return SDL_BlendPoint_RGB565(dst, x, y, blendMode, r, g, b, a);
+ }
+ break;
+ case 32:
+ switch (dst->format->Rmask) {
+ case 0x00FF0000:
+ if (!dst->format->Amask) {
+ return SDL_BlendPoint_RGB888(dst, x, y, blendMode, r, g, b,
+ a);
+ } else {
+ return SDL_BlendPoint_ARGB8888(dst, x, y, blendMode, r, g, b,
+ a);
+ }
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (!dst->format->Amask) {
+ return SDL_BlendPoint_RGB(dst, x, y, blendMode, r, g, b, a);
+ } else {
+ return SDL_BlendPoint_RGBA(dst, x, y, blendMode, r, g, b, a);
+ }
+}
+
+int
+SDL_BlendPoints(SDL_Surface * dst, const SDL_Point * points, int count,
+ SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
+{
+ int minx, miny;
+ int maxx, maxy;
+ int i;
+ int x, y;
+ int (*func)(SDL_Surface * dst, int x, int y,
+ SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
+ int status = 0;
+
+ if (!dst) {
+ return SDL_SetError("Passed NULL destination surface");
+ }
+
+ /* This function doesn't work on surfaces < 8 bpp */
+ if (dst->format->BitsPerPixel < 8) {
+ return SDL_SetError("SDL_BlendPoints(): Unsupported surface format");
+ }
+
+ 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_BlendPoint_RGB555;
+ break;
+ }
+ break;
+ case 16:
+ switch (dst->format->Rmask) {
+ case 0xF800:
+ func = SDL_BlendPoint_RGB565;
+ break;
+ }
+ break;
+ case 32:
+ switch (dst->format->Rmask) {
+ case 0x00FF0000:
+ if (!dst->format->Amask) {
+ func = SDL_BlendPoint_RGB888;
+ } else {
+ func = SDL_BlendPoint_ARGB8888;
+ }
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (!func) {
+ if (!dst->format->Amask) {
+ func = SDL_BlendPoint_RGB;
+ } else {
+ func = SDL_BlendPoint_RGBA;
+ }
+ }
+
+ minx = dst->clip_rect.x;
+ maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
+ miny = dst->clip_rect.y;
+ maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
+
+ for (i = 0; i < count; ++i) {
+ x = points[i].x;
+ y = points[i].y;
+
+ if (x < minx || x > maxx || y < miny || y > maxy) {
+ continue;
+ }
+ status = func(dst, x, y, blendMode, r, g, b, a);
+ }
+ return status;
+}
+
+#endif /* !SDL_RENDER_DISABLED */
+
+/* vi: set ts=4 sw=4 expandtab: */