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authorAndrei Karas <akaras@inbox.ru>2013-08-26 19:27:35 +0300
committerAndrei Karas <akaras@inbox.ru>2013-08-26 19:27:35 +0300
commita1a00f0ed5366cfb8dbe448078ccc60331a0cdaa (patch)
tree53118e9c8513217746f16e2cca7ed894b2c4e39f /src/safeopenglgraphics.cpp
parenta9b4bdf0bea8fe1b2be8f1839e95d7c0a5d012b1 (diff)
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improve a bit OpenGL drawing speed.
Diffstat (limited to 'src/safeopenglgraphics.cpp')
-rw-r--r--src/safeopenglgraphics.cpp57
1 files changed, 26 insertions, 31 deletions
diff --git a/src/safeopenglgraphics.cpp b/src/safeopenglgraphics.cpp
index ef415c5c4..c7af4c6a9 100644
--- a/src/safeopenglgraphics.cpp
+++ b/src/safeopenglgraphics.cpp
@@ -74,15 +74,13 @@ static inline void drawQuad(const Image *image,
{
if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
{
+ const float tw = static_cast<float>(image->mTexWidth);
+ const float th = static_cast<float>(image->mTexHeight);
// Find OpenGL normalized texture coordinates.
- const float texX1 = static_cast<float>(srcX)
- / static_cast<float>(image->mTexWidth);
- const float texY1 = static_cast<float>(srcY)
- / static_cast<float>(image->mTexHeight);
- const float texX2 = static_cast<float>(srcX + width)
- / static_cast<float>(image->mTexWidth);
- const float texY2 = static_cast<float>(srcY + height)
- / static_cast<float>(image->mTexHeight);
+ const float texX1 = static_cast<float>(srcX) / tw;
+ const float texY1 = static_cast<float>(srcY) / th;
+ const float texX2 = static_cast<float>(srcX + width) / tw;
+ const float texY2 = static_cast<float>(srcY + height) / th;
glTexCoord2f(texX1, texY1);
glVertex2i(dstX, dstY);
@@ -115,15 +113,13 @@ static inline void drawRescaledQuad(const Image *const image,
{
if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
{
+ const float tw = static_cast<float>(image->mTexWidth);
+ const float th = static_cast<float>(image->mTexHeight);
// Find OpenGL normalized texture coordinates.
- const float texX1 = static_cast<float>(srcX)
- / static_cast<float>(image->mTexWidth);
- const float texY1 = static_cast<float>(srcY)
- / static_cast<float>(image->mTexHeight);
- const float texX2 = static_cast<float>(srcX + width)
- / static_cast<float>(image->mTexWidth);
- const float texY2 = static_cast<float>(srcY + height)
- / static_cast<float>(image->mTexHeight);
+ const float texX1 = static_cast<float>(srcX) / tw;
+ const float texY1 = static_cast<float>(srcY) / th;
+ const float texX2 = static_cast<float>(srcX + width) / tw;
+ const float texY2 = static_cast<float>(srcY + height) / th;
glTexCoord2f(texX1, texY1);
glVertex2i(dstX, dstY);
@@ -158,9 +154,6 @@ bool SafeOpenGLGraphics::drawImage2(const Image *const image,
if (!image)
return false;
- srcX += image->mBounds.x;
- srcY += image->mBounds.y;
-
if (!useColor)
setColorAlpha(image->mAlpha);
@@ -170,7 +163,8 @@ bool SafeOpenGLGraphics::drawImage2(const Image *const image,
// Draw a textured quad.
glBegin(GL_QUADS);
- drawQuad(image, srcX, srcY, dstX, dstY, width, height);
+ drawQuad(image, srcX + image->mBounds.x, srcY + image->mBounds.y,
+ dstX, dstY, width, height);
glEnd();
return true;
@@ -258,13 +252,14 @@ void SafeOpenGLGraphics::drawImagePattern(const Image *const image,
if (!image)
return;
- const int iw = image->mBounds.w;
- const int ih = image->mBounds.h;
+ const SDL_Rect &imageRect = image->mBounds;
+ const int iw = imageRect.w;
+ const int ih = imageRect.h;
if (iw == 0 || ih == 0)
return;
- const int srcX = image->mBounds.x;
- const int srcY = image->mBounds.y;
+ const int srcX = imageRect.x;
+ const int srcY = imageRect.y;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
@@ -302,8 +297,9 @@ void SafeOpenGLGraphics::drawRescaledImagePattern(const Image *const image,
if (iw == 0 || ih == 0)
return;
- const int srcX = image->mBounds.x;
- const int srcY = image->mBounds.y;
+ const SDL_Rect &imageRect = image->mBounds;
+ const int srcX = imageRect.x;
+ const int srcY = imageRect.y;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
@@ -460,7 +456,8 @@ SDL_Surface* SafeOpenGLGraphics::getScreenshot()
unsigned int lineSize = 3 * w;
GLubyte* buf = static_cast<GLubyte*>(malloc(lineSize));
- for (int i = 0; i < (h / 2); i++)
+ const int h2 = h / 2;
+ for (int i = 0; i < h2; i++)
{
GLubyte *const top = static_cast<GLubyte*>(
screenshot->pixels) + lineSize * i;
@@ -500,12 +497,10 @@ bool SafeOpenGLGraphics::pushClipArea(gcn::Rectangle area)
const bool result = gcn::Graphics::pushClipArea(area);
const gcn::ClipRectangle &clipArea = mClipStack.top();
- transX += clipArea.xOffset;
- transY += clipArea.yOffset;
glPushMatrix();
- glTranslatef(static_cast<GLfloat>(transX),
- static_cast<GLfloat>(transY), 0);
+ glTranslatef(static_cast<GLfloat>(transX + clipArea.xOffset),
+ static_cast<GLfloat>(transY + clipArea.yOffset), 0);
glScissor(clipArea.x, mRect.h - clipArea.y - clipArea.height,
clipArea.width, clipArea.height);