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kwin: Update the GL1 code in GLVertexBuffer to match the VBO code

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This saves two memory allocations in the GL1 path in setData().
This commit is contained in:
Fredrik Höglund 2012-09-12 22:16:22 +02:00
parent e1a33cec44
commit 87ad8789f1
1 changed files with 19 additions and 26 deletions
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45
libkwineffects/kwinglutils.cpp
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@ -1222,8 +1222,7 @@ public:
static bool supported;
static GLVertexBuffer *streamingBuffer;
static bool hasMapBufferRange;
QVector<float> legacyVertices;
QVector<float> legacyTexCoords;
QByteArray dataStore;
bool useColor;
bool useTexCoords;
QColor color;
@ -1294,10 +1293,11 @@ void GLVertexBufferPrivate::legacyPainting(QRegion region, GLenum primitiveMode,
#else
// Enable arrays
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(dimension, GL_FLOAT, 0, legacyVertices.constData());
if (!legacyTexCoords.isEmpty()) {
glVertexPointer(dimension, GL_FLOAT, stride, (const GLvoid *) vertexAddress);
if (useTexCoords) {
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, legacyTexCoords.constData());
glTexCoordPointer(2, GL_FLOAT, stride, (const GLvoid *) texCoordAddress);
}
if (useColor) {
@ -1314,7 +1314,7 @@ void GLVertexBufferPrivate::legacyPainting(QRegion region, GLenum primitiveMode,
}
glDisableClientState(GL_VERTEX_ARRAY);
if (!legacyTexCoords.isEmpty()) {
if (useTexCoords) {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
#endif
@ -1445,30 +1445,23 @@ void GLVertexBuffer::setData(int vertexCount, int dim, const float* vertices, co
d->vertexCount = vertexCount;
d->dimension = dim;
d->useTexCoords = (texcoords != NULL);
if (!GLVertexBufferPrivate::supported) {
// legacy data
d->legacyVertices.clear();
d->legacyVertices.reserve(vertexCount * dim);
for (int i = 0; i < vertexCount * dim; ++i) {
d->legacyVertices << vertices[i];
}
d->legacyTexCoords.clear();
if (d->useTexCoords) {
d->legacyTexCoords.reserve(vertexCount * 2);
for (int i = 0; i < vertexCount * 2; ++i) {
d->legacyTexCoords << texcoords[i];
}
}
return;
}
d->vertexAddress = 0;
d->texCoordAddress = dim * sizeof(float);
d->stride = (dim + (texcoords ? 2 : 0)) * sizeof(float);
size_t size = vertexCount * d->stride;
if (!GLVertexBufferPrivate::supported) {
// Legacy data
if (size_t(d->dataStore.size()) < size)
d->dataStore.resize(size);
d->interleaveArrays((float *) d->dataStore.data(),
dim, vertices, texcoords, vertexCount);
d->vertexAddress = intptr_t(d->dataStore.data());
d->texCoordAddress = d->vertexAddress + dim * sizeof(float);
return;
}
glBindBuffer(GL_ARRAY_BUFFER, d->buffer);
if (d->hasMapBufferRange) {