From 6afba95ef62b22c303336adba6d891eeffe66c49 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sun, 17 Jul 2011 18:16:49 +0300
Subject: Add basic tiles caching for opengl.

---
 src/openglgraphics.cpp | 187 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)

(limited to 'src/openglgraphics.cpp')

diff --git a/src/openglgraphics.cpp b/src/openglgraphics.cpp
index e27de66c5..5406f6040 100644
--- a/src/openglgraphics.cpp
+++ b/src/openglgraphics.cpp
@@ -811,6 +811,193 @@ void OpenGLGraphics::calcImagePattern(GraphicsVertexes* vert, Image *image,
     vert->incPtr(1);
 }
 
+void OpenGLGraphics::calcTile(ImageVertexes *vert, int x, int y)
+{
+    if (!vert)
+        return;
+
+    Image *image = vert->image;
+    const int srcX = image->mBounds.x;
+    const int srcY = image->mBounds.y;
+
+    const int iw = image->mBounds.w;
+    const int ih = image->mBounds.h;
+    const int w = iw;
+    const int h = ih;
+
+    if (iw == 0 || ih == 0)
+        return;
+
+    const float tw = static_cast<float>(image->getTextureWidth());
+    const float th = static_cast<float>(image->getTextureHeight());
+
+    const unsigned int vLimit = vertexBufSize * 4;
+
+    OpenGLGraphicsVertexes *ogl = vert->ogl;
+
+    unsigned int vp = ogl->continueVp();
+
+    // Draw a set of textured rectangles
+    if (image->mTextureType == GL_TEXTURE_2D)
+    {
+        float texX1 = static_cast<float>(srcX) / tw;
+        float texY1 = static_cast<float>(srcY) / th;
+
+        GLfloat *floatTexArray = ogl->continueFloatTexArray();
+        GLint *intVertArray = ogl->continueIntVertArray();
+
+        for (int py = 0; py < h; py += ih)
+        {
+            const int height = (py + ih >= h) ? h - py : ih;
+            const int dstY = y + py;
+            for (int px = 0; px < w; px += iw)
+            {
+                int width = (px + iw >= w) ? w - px : iw;
+                int dstX = x + px;
+
+                float texX2 = static_cast<float>(srcX + width) / tw;
+                float texY2 = static_cast<float>(srcY + height) / th;
+
+                floatTexArray[vp + 0] = texX1;
+                floatTexArray[vp + 1] = texY1;
+
+                floatTexArray[vp + 2] = texX2;
+                floatTexArray[vp + 3] = texY1;
+
+                floatTexArray[vp + 4] = texX2;
+                floatTexArray[vp + 5] = texY2;
+
+                floatTexArray[vp + 6] = texX1;
+                floatTexArray[vp + 7] = texY2;
+
+                intVertArray[vp + 0] = dstX;
+                intVertArray[vp + 1] = dstY;
+
+                intVertArray[vp + 2] = dstX + width;
+                intVertArray[vp + 3] = dstY;
+
+                intVertArray[vp + 4] = dstX + width;
+                intVertArray[vp + 5] = dstY + height;
+
+                intVertArray[vp + 6] = dstX;
+                intVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    floatTexArray = ogl->switchFloatTexArray();
+                    intVertArray = ogl->switchIntVertArray();
+                    ogl->switchVp(vp);
+                    vp = 0;
+                }
+            }
+        }
+    }
+    else
+    {
+        GLint *intTexArray = ogl->continueIntTexArray();
+        GLint *intVertArray = ogl->continueIntVertArray();
+
+        for (int py = 0; py < h; py += ih)
+        {
+            const int height = (py + ih >= h) ? h - py : ih;
+            const int dstY = y + py;
+            for (int px = 0; px < w; px += iw)
+            {
+                int width = (px + iw >= w) ? w - px : iw;
+                int dstX = x + px;
+
+                intTexArray[vp + 0] = srcX;
+                intTexArray[vp + 1] = srcY;
+
+                intTexArray[vp + 2] = srcX + width;
+                intTexArray[vp + 3] = srcY;
+
+                intTexArray[vp + 4] = srcX + width;
+                intTexArray[vp + 5] = srcY + height;
+
+                intTexArray[vp + 6] = srcX;
+                intTexArray[vp + 7] = srcY + height;
+
+                intVertArray[vp + 0] = dstX;
+                intVertArray[vp + 1] = dstY;
+
+                intVertArray[vp + 2] = dstX + width;
+                intVertArray[vp + 3] = dstY;
+
+                intVertArray[vp + 4] = dstX + width;
+                intVertArray[vp + 5] = dstY + height;
+
+                intVertArray[vp + 6] = dstX;
+                intVertArray[vp + 7] = dstY + height;
+
+                vp += 8;
+                if (vp >= vLimit)
+                {
+                    intTexArray = ogl->switchIntTexArray();
+                    intVertArray = ogl->switchIntVertArray();
+                    ogl->switchVp(vp);
+                    vp = 0;
+                }
+            }
+        }
+    }
+    ogl->switchVp(vp);
+}
+
+void OpenGLGraphics::drawTile(ImageVertexes *vert)
+{
+    if (!vert)
+        return;
+    Image *image = vert->image;
+
+    OpenGLGraphicsVertexes *ogl = vert->ogl;
+
+    glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
+    bindTexture(Image::mTextureType, image->mGLImage);
+    setTexturingAndBlending(true);
+
+    std::vector<GLint*> *intVertPool = ogl->getIntVertPool();
+    std::vector<GLint*>::iterator iv;
+    std::vector<int> *vp = ogl->getVp();
+    std::vector<int>::iterator ivp;
+
+    // Draw a set of textured rectangles
+    if (image->mTextureType == GL_TEXTURE_2D)
+    {
+        std::vector<GLfloat*> *floatTexPool = ogl->getFloatTexPool();
+        std::vector<GLfloat*>::iterator ft;
+
+        for (iv = intVertPool->begin(), ft = floatTexPool->begin(),
+             ivp = vp->begin();
+             iv != intVertPool->end(), ft != floatTexPool->end(),
+             ivp != vp->end();
+             ++ iv, ++ ft, ++ ivp)
+        {
+            drawQuadArrayfi(*iv, *ft, *ivp);
+        }
+    }
+    else
+    {
+        std::vector<GLint*> *intTexPool = ogl->getIntTexPool();
+        std::vector<GLint*>::iterator it;
+
+        for (iv = intVertPool->begin(), it = intTexPool->begin(),
+             ivp = vp->begin();
+             iv != intVertPool->end(), it != intTexPool->end(),
+             ivp != vp->end();
+             ++ iv, ++ it, ++ ivp)
+        {
+            drawQuadArrayii(*iv, *it, *ivp);
+        }
+    }
+
+    glColor4ub(static_cast<GLubyte>(mColor.r),
+               static_cast<GLubyte>(mColor.g),
+               static_cast<GLubyte>(mColor.b),
+               static_cast<GLubyte>(mColor.a));
+}
+
 void OpenGLGraphics::updateScreen()
 {
 //    glFlush();
-- 
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