diff options
Diffstat (limited to 'src/openglgraphics.cpp')
| -rw-r--r-- | src/openglgraphics.cpp | 77 |
1 files changed, 45 insertions, 32 deletions
diff --git a/src/openglgraphics.cpp b/src/openglgraphics.cpp index c24b7d64..84f499a4 100644 --- a/src/openglgraphics.cpp +++ b/src/openglgraphics.cpp @@ -478,24 +478,26 @@ void OpenGLGraphics::drawImagePattern(Image *image, int x, int y, int w, int h) static_cast<GLubyte>(mColor.a)); } -void OpenGLGraphics::drawRescaledImagePattern(Image *image, int x, int y, - int w, int h, int scaledWidth, +void OpenGLGraphics::drawRescaledImagePattern(Image *image, + int x, int y, + int w, int h, + int scaledWidth, int scaledHeight) { if (!image) return; + if (scaledWidth == 0 || scaledHeight == 0) + return; + const int srcX = image->mBounds.x; const int srcY = image->mBounds.y; - const int iw = scaledWidth; - const int ih = scaledHeight; + const int iw = image->getWidth(); + const int ih = image->getHeight(); if (iw == 0 || ih == 0) return; - const float tw = static_cast<float>(image->getTextureWidth()); - const float th = static_cast<float>(image->getTextureHeight()); - glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha); bindTexture(Image::mTextureType, image->mGLImage); @@ -505,23 +507,31 @@ void OpenGLGraphics::drawRescaledImagePattern(Image *image, int x, int y, unsigned int vp = 0; const unsigned int vLimit = vertexBufSize * 4; - float texX1 = static_cast<float>(srcX) / tw; - float texY1 = static_cast<float>(srcY) / th; - // Draw a set of textured rectangles if (image->getTextureType() == GL_TEXTURE_2D) { - for (int py = 0; py < h; py += ih) + const float tw = static_cast<float>(image->getTextureWidth()); + const float th = static_cast<float>(image->getTextureHeight()); + + const float texX1 = static_cast<float>(srcX) / tw; + const float texY1 = static_cast<float>(srcY) / th; + + const float tFractionW = iw / tw; + const float tFractionH = ih / th; + + for (int py = 0; py < h; py += scaledHeight) { - const int height = (py + ih >= h) ? h - py : ih; + const int height = (py + scaledHeight >= h) ? h - py : scaledHeight; const int dstY = y + py; - for (int px = 0; px < w; px += iw) + for (int px = 0; px < w; px += scaledWidth) { - int width = (px + iw >= w) ? w - px : iw; + int width = (px + scaledWidth >= w) ? w - px : scaledWidth; int dstX = x + px; + const float visibleFractionW = (float) width / scaledWidth; + const float visibleFractionH = (float) height / scaledHeight; - float texX2 = static_cast<float>(srcX + width) / tw; - float texY2 = static_cast<float>(srcY + height) / th; + const float texX2 = texX1 + tFractionW * visibleFractionW; + const float texY2 = texY1 + tFractionH * visibleFractionH; mFloatTexArray[vp + 0] = texX1; mFloatTexArray[vp + 1] = texY1; @@ -538,14 +548,14 @@ void OpenGLGraphics::drawRescaledImagePattern(Image *image, int x, int y, mIntVertArray[vp + 0] = dstX; mIntVertArray[vp + 1] = dstY; - mIntVertArray[vp + 2] = dstX + scaledWidth; + mIntVertArray[vp + 2] = dstX + width; mIntVertArray[vp + 3] = dstY; - mIntVertArray[vp + 4] = dstX + scaledWidth; - mIntVertArray[vp + 5] = dstY + scaledHeight; + mIntVertArray[vp + 4] = dstX + width; + mIntVertArray[vp + 5] = dstY + height; mIntVertArray[vp + 6] = dstX; - mIntVertArray[vp + 7] = dstY + scaledHeight; + mIntVertArray[vp + 7] = dstY + height; vp += 8; if (vp >= vLimit) @@ -560,38 +570,41 @@ void OpenGLGraphics::drawRescaledImagePattern(Image *image, int x, int y, } else { - for (int py = 0; py < h; py += ih) + const float scaleFactorW = (float) scaledWidth / iw; + const float scaleFactorH = (float) scaledHeight / ih; + + for (int py = 0; py < h; py += scaledHeight) { - const int height = (py + ih >= h) ? h - py : ih; + const int height = (py + scaledHeight >= h) ? h - py : scaledHeight; const int dstY = y + py; - for (int px = 0; px < w; px += iw) + for (int px = 0; px < w; px += scaledWidth) { - int width = (px + iw >= w) ? w - px : iw; + int width = (px + scaledWidth >= w) ? w - px : scaledWidth; int dstX = x + px; mIntTexArray[vp + 0] = srcX; mIntTexArray[vp + 1] = srcY; - mIntTexArray[vp + 2] = srcX + width; + mIntTexArray[vp + 2] = srcX + width / scaleFactorW; mIntTexArray[vp + 3] = srcY; - mIntTexArray[vp + 4] = srcX + width; - mIntTexArray[vp + 5] = srcY + height; + mIntTexArray[vp + 4] = srcX + width / scaleFactorW; + mIntTexArray[vp + 5] = srcY + height / scaleFactorH; mIntTexArray[vp + 6] = srcX; - mIntTexArray[vp + 7] = srcY + height; + mIntTexArray[vp + 7] = srcY + height / scaleFactorH; mIntVertArray[vp + 0] = dstX; mIntVertArray[vp + 1] = dstY; - mIntVertArray[vp + 2] = dstX + scaledWidth; + mIntVertArray[vp + 2] = dstX + width; mIntVertArray[vp + 3] = dstY; - mIntVertArray[vp + 4] = dstX + scaledWidth; - mIntVertArray[vp + 5] = dstY + scaledHeight; + mIntVertArray[vp + 4] = dstX + width; + mIntVertArray[vp + 5] = dstY + height; mIntVertArray[vp + 6] = dstX; - mIntVertArray[vp + 7] = dstY + scaledHeight; + mIntVertArray[vp + 7] = dstY + height; vp += 8; if (vp >= vLimit) |