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kwin: Use the new map() interface in renderQuads()

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Write the vertex data directly into the buffer object, instead of
allocating two temporary arrays, coyping the data into them, and
then copying the data from the arrays into the buffer object.

This also makes renderQuads() handle coordinates for rectangular
textures correctly.
This commit is contained in:
Fredrik Höglund 2012-09-18 22:24:58 +02:00
parent 7a00648195
commit 9c1833920c
1 changed files with 17 additions and 18 deletions
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35
scene_opengl.cpp
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@ -1312,25 +1312,24 @@ void SceneOpenGL::Window::renderQuads(int, const QRegion& region, const WindowQu
{
if (quads.isEmpty())
return;
const QMatrix4x4 matrix = tex->matrix(normalized ? NormalizedCoordinates : UnnormalizedCoordinates);
const GLVertexAttrib attribs[] = {
{ VA_Position, 2, GL_FLOAT, offsetof(GLVertex2D, position) },
{ VA_TexCoord, 2, GL_FLOAT, offsetof(GLVertex2D, texcoord) },
};
// Render geometry
float* vertices;
float* texcoords;
QSizeF size(tex->size());
if (normalized) {
size.setWidth(1.0);
size.setHeight(1.0);
}
#ifndef KWIN_HAVE_OPENGLES
if (tex->target() == GL_TEXTURE_RECTANGLE_ARB) {
size.setWidth(1.0);
size.setHeight(1.0);
}
#endif
quads.makeArrays(&vertices, &texcoords, size, tex->isYInverted());
GLVertexBuffer::streamingBuffer()->setData(quads.count() * 6, 2, vertices, texcoords);
GLVertexBuffer::streamingBuffer()->render(region, GL_TRIANGLES, hardwareClipping);
delete[] vertices;
delete[] texcoords;
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->setAttribLayout(attribs, 2, sizeof(GLVertex2D));
vbo->setVertexCount(quads.count() * 6);
GLVertex2D *map = (GLVertex2D *) vbo->map(quads.count() * 6 * sizeof(GLVertex2D));
quads.makeInterleavedArrays(map, matrix);
vbo->unmap();
vbo->render(region, GL_TRIANGLES, hardwareClipping);
}
GLTexture *SceneOpenGL::Window::textureForType(SceneOpenGL::Window::TextureType type)