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Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_blendline.c')
-rw-r--r--3rdparty/SDL2/src/render/software/SDL_blendline.c777
1 files changed, 777 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_blendline.c b/3rdparty/SDL2/src/render/software/SDL_blendline.c
new file mode 100644
index 00000000000..ef0d585316c
--- /dev/null
+++ b/3rdparty/SDL2/src/render/software/SDL_blendline.c
@@ -0,0 +1,777 @@
+/*
+ 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_blendline.h"
+#include "SDL_blendpoint.h"
+
+
+static void
+SDL_BlendLine_RGB2(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)
+{
+ const SDL_PixelFormat *fmt = dst->format;
+ 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(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ HLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else if (x1 == x2) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ VLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else if (ABS(x1 - x2) == ABS(y1 - y2)) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ DLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_ADD_RGB,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_MOD_RGB,
+ draw_end);
+ break;
+ default:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
+ draw_end);
+ break;
+ }
+ }
+}
+
+static void
+SDL_BlendLine_RGB555(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(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
+ break;
+ default:
+ HLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
+ break;
+ }
+ } else if (x1 == x2) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
+ break;
+ default:
+ VLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
+ break;
+ }
+ } else if (ABS(x1 - x2) == ABS(y1 - y2)) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
+ break;
+ default:
+ DLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
+ break;
+ }
+ } else {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_ADD_RGB555,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_MOD_RGB555,
+ draw_end);
+ break;
+ default:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
+ draw_end);
+ break;
+ }
+ }
+}
+
+static void
+SDL_BlendLine_RGB565(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(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
+ break;
+ default:
+ HLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
+ break;
+ }
+ } else if (x1 == x2) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
+ break;
+ default:
+ VLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
+ break;
+ }
+ } else if (ABS(x1 - x2) == ABS(y1 - y2)) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
+ break;
+ default:
+ DLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
+ break;
+ }
+ } else {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_ADD_RGB565,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_MOD_RGB565,
+ draw_end);
+ break;
+ default:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
+ draw_end);
+ break;
+ }
+ }
+}
+
+static void
+SDL_BlendLine_RGB4(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)
+{
+ const SDL_PixelFormat *fmt = dst->format;
+ 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_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ HLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else if (x1 == x2) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ VLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else if (ABS(x1 - x2) == ABS(y1 - y2)) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
+ break;
+ default:
+ DLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
+ break;
+ }
+ } else {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_ADD_RGB,
+ draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_MOD_RGB,
+ draw_end);
+ break;
+ default:
+ AALINE(x1, y1, x2, y2,
+ DRAW_SETPIXELXY4_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
+ draw_end);
+ break;
+ }
+ }
+}
+
+static void
+SDL_BlendLine_RGBA4(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)
+{
+ const SDL_PixelFormat *fmt = dst->format;
+ 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_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ HLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ HLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
+ break;
+ default:
+ HLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
+ break;
+ }
+ } else if (x1 == x2) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ VLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ VLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
+ break;
+ default:
+ VLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
+ break;
+ }
+ } else if (ABS(x1 - x2) == ABS(y1 - y2)) {
+ switch (blendMode) {
+ case SDL_BLENDMODE_BLEND:
+ DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_ADD:
+ DLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
+ break;
+ case SDL_BLENDMODE_MOD:
+ DLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
+ break;
+ default:
+ 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: */