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kwin: Simplify makeDecorationArrays()

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This also fixes coordinate inversion for rectangular textures.
This commit is contained in:
Fredrik Höglund 2012-09-11 18:04:30 +02:00
parent d4aacd678e
commit 6891c900b3
1 changed files with 27 additions and 49 deletions
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76
scene_opengl.cpp
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@ -1261,63 +1261,41 @@ void SceneOpenGL::Window::paintShadow(const QRegion &region, const WindowPaintDa
#endif
}
void SceneOpenGL::Window::makeDecorationArrays(const WindowQuadList& quads, const QRect &rect, GLTexture *tex) const
void SceneOpenGL::Window::makeDecorationArrays(const WindowQuadList &quads, const QRect &rect, GLTexture *texture) const
{
QVector<float> vertices;
QVector<float> texcoords;
vertices.reserve(quads.count() * 6 * 2);
texcoords.reserve(quads.count() * 6 * 2);
float width = rect.width();
float height = rect.height();
#ifndef KWIN_HAVE_OPENGLES
if (tex->target() == GL_TEXTURE_RECTANGLE_ARB) {
width = 1.0;
height = 1.0;
}
#endif
foreach (const WindowQuad & quad, quads) {
vertices << quad[ 1 ].x();
vertices << quad[ 1 ].y();
vertices << quad[ 0 ].x();
vertices << quad[ 0 ].y();
vertices << quad[ 3 ].x();
vertices << quad[ 3 ].y();
vertices << quad[ 3 ].x();
vertices << quad[ 3 ].y();
vertices << quad[ 2 ].x();
vertices << quad[ 2 ].y();
vertices << quad[ 1 ].x();
vertices << quad[ 1 ].y();
if (tex->isYInverted()) {
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << (float)(quad.originalTop() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << (float)(quad.originalTop() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << (float)(quad.originalTop() - rect.y()) / height;
} else {
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalTop() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalTop() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalLeft() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalBottom() - rect.y()) / height;
texcoords << (float)(quad.originalRight() - rect.x()) / width;
texcoords << 1.0f - (float)(quad.originalTop() - rect.y()) / height;
// Since we know that the texture matrix just scales and translates
// we can use this information to optimize the transformation
QMatrix4x4 matrix = texture->matrix(UnnormalizedCoordinates);
matrix.translate(-rect.x(), -rect.y());
float uCoeff = matrix(0, 0);
float vCoeff = matrix(1, 1);
float uOffset = matrix(0, 3);
float vOffset = matrix(1, 3);
// Note: The positions in a WindowQuad are stored in clockwise order
const int index[] = { 1, 0, 3, 3, 2, 1 };
foreach (const WindowQuad &quad, quads) {
for (int i = 0; i < 6; i++) {
const WindowVertex &v = quad[index[i]];
vertices << v.x();
vertices << v.y();
texcoords << v.originalX() * uCoeff + uOffset;
texcoords << v.originalY() * vCoeff + vOffset;
}
}
GLVertexBuffer::streamingBuffer()->setData(quads.count() * 6, 2, vertices.data(), texcoords.data());
GLVertexBuffer::streamingBuffer()->setData(quads.count() * 6, 2, vertices.constData(), texcoords.constData());
}
void SceneOpenGL::Window::renderQuads(int, const QRegion& region, const WindowQuadList& quads,