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-rw-r--r--src/sdlgraphics.cpp311
1 files changed, 311 insertions, 0 deletions
diff --git a/src/sdlgraphics.cpp b/src/sdlgraphics.cpp
index 81970b0e3..a8cb084ba 100644
--- a/src/sdlgraphics.cpp
+++ b/src/sdlgraphics.cpp
@@ -771,3 +771,314 @@ void SDLGraphics::fillRectangle(const gcn::Rectangle& rectangle)
SDL_FillRect(mTarget, &rect, color);
}
}
+
+void SDLGraphics::_beginDraw()
+{
+ pushClipArea(gcn::Rectangle(0, 0, mTarget->w, mTarget->h));
+}
+
+void SDLGraphics::_endDraw()
+{
+ popClipArea();
+}
+
+bool SDLGraphics::pushClipArea(gcn::Rectangle area)
+{
+ SDL_Rect rect;
+ const bool result = gcn::Graphics::pushClipArea(area);
+
+ const gcn::ClipRectangle &carea = mClipStack.top();
+ rect.x = static_cast<int16_t>(carea.x);
+ rect.y = static_cast<int16_t>(carea.y);
+ rect.w = static_cast<int16_t>(carea.width);
+ rect.h = static_cast<int16_t>(carea.height);
+ SDL_SetClipRect(mTarget, &rect);
+
+ return result;
+}
+
+void SDLGraphics::popClipArea()
+{
+ gcn::Graphics::popClipArea();
+
+ if (mClipStack.empty())
+ return;
+
+ const gcn::ClipRectangle &carea = mClipStack.top();
+ SDL_Rect rect;
+ rect.x = static_cast<int16_t>(carea.x);
+ rect.y = static_cast<int16_t>(carea.y);
+ rect.w = static_cast<int16_t>(carea.width);
+ rect.h = static_cast<int16_t>(carea.height);
+
+ SDL_SetClipRect(mTarget, &rect);
+}
+
+void SDLGraphics::drawPoint(int x, int y)
+{
+ if (mClipStack.empty())
+ return;
+
+ const gcn::ClipRectangle& top = mClipStack.top();
+
+ x += top.xOffset;
+ y += top.yOffset;
+
+ if (!top.isPointInRect(x, y))
+ return;
+
+ if (mAlpha)
+ SDLputPixelAlpha(mTarget, x, y, mColor);
+ else
+ SDLputPixel(mTarget, x, y, mColor);
+}
+
+void SDLGraphics::drawHLine(int x1, int y, int x2)
+{
+ if (mClipStack.empty())
+ return;
+
+ const gcn::ClipRectangle& top = mClipStack.top();
+
+ x1 += top.xOffset;
+ y += top.yOffset;
+ x2 += top.xOffset;
+
+ if (y < top.y || y >= top.y + top.height)
+ return;
+
+ if (x1 > x2)
+ {
+ x1 ^= x2;
+ x2 ^= x1;
+ x1 ^= x2;
+ }
+
+ if (top.x > x1)
+ {
+ if (top.x > x2)
+ return;
+
+ x1 = top.x;
+ }
+
+ if (top.x + top.width <= x2)
+ {
+ if (top.x + top.width <= x1)
+ return;
+
+ x2 = top.x + top.width -1;
+ }
+
+ const int bpp = mTarget->format->BytesPerPixel;
+
+ SDL_LockSurface(mTarget);
+
+ uint8_t *p = static_cast<uint8_t*>(mTarget->pixels)
+ + y * mTarget->pitch + x1 * bpp;
+
+ const uint32_t pixel = SDL_MapRGB(mTarget->format,
+ static_cast<uint8_t>(mColor.r),
+ static_cast<uint8_t>(mColor.g),
+ static_cast<uint8_t>(mColor.b));
+ switch (bpp)
+ {
+ case 1:
+ for (; x1 <= x2; ++x1)
+ *(p++) = static_cast<uint8_t>(pixel);
+ break;
+
+ case 2:
+ {
+ uint16_t* q = reinterpret_cast<uint16_t*>(p);
+ for (; x1 <= x2; ++x1)
+ *(q++) = pixel;
+ break;
+ }
+
+ case 3:
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ for (; x1 <= x2; ++x1)
+ {
+ p[0] = static_cast<uint8_t>((pixel >> 16) & 0xff);
+ p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff);
+ p[2] = static_cast<uint8_t>(pixel & 0xff);
+ p += 3;
+ }
+#else
+ for (; x1 <= x2; ++x1)
+ {
+ p[0] = static_cast<uint8_t>(pixel & 0xff);
+ p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff);
+ p[2] = static_cast<uint8_t>((pixel >> 16) & 0xff);
+ p += 3;
+ }
+#endif
+ break;
+
+ case 4:
+ {
+ uint32_t *q = reinterpret_cast<uint32_t*>(p);
+ for (; x1 <= x2; ++x1)
+ {
+ if (mAlpha)
+ {
+ *q = gcn::SDLAlpha32(pixel, *q,
+ static_cast<unsigned char>(mColor.a));
+ q++;
+ }
+ else
+ {
+ *(q++) = pixel;
+ }
+ }
+ break;
+ }
+ default:
+ break;
+ } // end switch
+
+ SDL_UnlockSurface(mTarget);
+}
+
+void SDLGraphics::drawVLine(int x, int y1, int y2)
+{
+ if (mClipStack.empty())
+ return;
+
+ const gcn::ClipRectangle& top = mClipStack.top();
+
+ x += top.xOffset;
+ y1 += top.yOffset;
+ y2 += top.yOffset;
+
+ if (x < top.x || x >= top.x + top.width)
+ return;
+
+ if (y1 > y2)
+ {
+ y1 ^= y2;
+ y2 ^= y1;
+ y1 ^= y2;
+ }
+
+ if (top.y > y1)
+ {
+ if (top.y > y2)
+ return;
+
+ y1 = top.y;
+ }
+
+ if (top.y + top.height <= y2)
+ {
+ if (top.y + top.height <= y1)
+ return;
+
+ y2 = top.y + top.height - 1;
+ }
+
+ const int bpp = mTarget->format->BytesPerPixel;
+
+ SDL_LockSurface(mTarget);
+
+ uint8_t *p = static_cast<uint8_t*>(mTarget->pixels)
+ + y1 * mTarget->pitch + x * bpp;
+
+ const uint32_t pixel = SDL_MapRGB(mTarget->format,
+ static_cast<uint8_t>(mColor.r),
+ static_cast<uint8_t>(mColor.g),
+ static_cast<uint8_t>(mColor.b));
+
+ switch (bpp)
+ {
+ case 1:
+ for (; y1 <= y2; ++y1)
+ {
+ *p = static_cast<uint8_t>(pixel);
+ p += mTarget->pitch;
+ }
+ break;
+
+ case 2:
+ for (; y1 <= y2; ++ y1)
+ {
+ *reinterpret_cast<uint16_t*>(p)
+ = static_cast<uint16_t>(pixel);
+ p += mTarget->pitch;
+ }
+ break;
+
+ case 3:
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ for (; y1 <= y2; ++y1)
+ {
+ p[0] = static_cast<uint8_t>((pixel >> 16) & 0xff);
+ p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff);
+ p[2] = static_cast<uint8_t>(pixel & 0xff);
+ p += mTarget->pitch;
+ }
+#else
+ for (; y1 <= y2; ++y1)
+ {
+ p[0] = static_cast<uint8_t>(pixel & 0xff);
+ p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff);
+ p[2] = static_cast<uint8_t>((pixel >> 16) & 0xff);
+ p += mTarget->pitch;
+ }
+#endif
+ break;
+
+ case 4:
+ for (; y1 <= y2; ++y1)
+ {
+ if (mAlpha)
+ {
+ *reinterpret_cast<uint32_t*>(p) = gcn::SDLAlpha32(pixel,
+ *reinterpret_cast<uint32_t*>(p),
+ static_cast<unsigned char>(mColor.a));
+ }
+ else
+ {
+ *reinterpret_cast<uint32_t*>(p) = pixel;
+ }
+ p += mTarget->pitch;
+ }
+ break;
+
+ default:
+ break;
+ } // end switch
+
+ SDL_UnlockSurface(mTarget);
+}
+
+void SDLGraphics::drawRectangle(const gcn::Rectangle &rectangle)
+{
+ const int x1 = rectangle.x;
+ const int x2 = rectangle.x + rectangle.width - 1;
+ const int y1 = rectangle.y;
+ const int y2 = rectangle.y + rectangle.height - 1;
+
+ drawHLine(x1, y1, x2);
+ drawHLine(x1, y2, x2);
+
+ drawVLine(x1, y1, y2);
+ drawVLine(x2, y1, y2);
+}
+
+void SDLGraphics::drawLine(int x1, int y1, int x2, int y2)
+{
+ if (x1 == x2)
+ {
+ drawVLine(x1, y1, y2);
+ return;
+ }
+ if (y1 == y2)
+ {
+ drawHLine(x1, y1, x2);
+ return;
+ }
+
+ // other cases not implimented
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-14 08:04:10 +0000