DECLINLINE(GLfloat*) crBltVtRectsTFNormalized(const RTRECT *paRects, uint32_t cRects, uint32_t normalX, uint32_t normalY, GLfloat* pBuff, uint32_t height)
{
for (uint32_t i = 0; i < cRects; ++i)
{
pBuff = crBltVtRectTFNormalized(&paRects[i], normalX, normalY, pBuff, height);
}
return pBuff;
}
/* Indexed GL_TRIANGLES */
DECLINLINE(GLfloat*) crBltVtRectITNormalized(const RTRECT *pRect, uint32_t normalX, uint32_t normalY, GLfloat* pBuff, uint32_t height)
{
GLfloat* ret = crBltVtRectTFNormalized(pRect, normalX, normalY, pBuff, height);
return ret;
}
static DECLCALLBACK(int) crBltBlitTexBufImplDraw2D(PCR_BLITTER pBlitter, const VBOXVR_TEXTURE *pSrc, const RTRECT *paSrcRect, const RTRECTSIZE *pDstSize, const RTRECT *paDstRect, uint32_t cRects, uint32_t fFlags)
{
GLuint normalX, normalY;
uint32_t srcHeight = (fFlags & CRBLT_F_INVERT_SRC_YCOORDS) ? pSrc->height : 0;
uint32_t dstHeight = (fFlags & CRBLT_F_INVERT_DST_YCOORDS) ? pDstSize->cy : 0;
Assert(srcHeight == dstHeight);
switch (pSrc->target)
{
case GL_TEXTURE_2D:
{
normalX = pSrc->width;
normalY = pSrc->height;
break;
}
case GL_TEXTURE_RECTANGLE_ARB:
{
normalX = 1;
normalY = 1;
break;
}
default:
{
crWarning("Unsupported texture target 0x%x", pSrc->target);
return VERR_INVALID_PARAMETER;
}
}
Assert(pSrc->hwid);
pBlitter->pDispatch->BindTexture(pSrc->target, pSrc->hwid);
if (cRects == 1)
{
/* just optimizatino to draw a single rect with GL_TRIANGLE_FAN */
bool bUseSameVerticies = paSrcRect == paDstRect && normalX == 1 && normalY == 1 && srcHeight == dstHeight;
GLfloat *pVerticies;
GLfloat *pTexCoords;
GLuint cElements = crBltVtGetNumVerticiesTF(1);
if (bUseSameVerticies)
{
pVerticies = (GLfloat*)crBltBufGet(&pBlitter->Verticies, cElements * 2 * sizeof (*pVerticies));
crBltVtRectTFNormalized(paDstRect, normalX, normalY, pVerticies, dstHeight);
pTexCoords = pVerticies;
}
else
{
pVerticies = (GLfloat*)crBltBufGet(&pBlitter->Verticies, cElements * 2 * 2 * sizeof (*pVerticies));
pTexCoords = crBltVtRectTFNormalized(paDstRect, 1, 1, pVerticies, dstHeight);
crBltVtRectTFNormalized(paSrcRect, normalX, normalY, pTexCoords, srcHeight);
}
pBlitter->pDispatch->EnableClientState(GL_VERTEX_ARRAY);
pBlitter->pDispatch->VertexPointer(2, GL_FLOAT, 0, pVerticies);
pBlitter->pDispatch->EnableClientState(GL_TEXTURE_COORD_ARRAY);
pBlitter->pDispatch->TexCoordPointer(2, GL_FLOAT, 0, pTexCoords);
pBlitter->pDispatch->Enable(pSrc->target);
pBlitter->pDispatch->DrawArrays(GL_TRIANGLE_FAN, 0, cElements);
pBlitter->pDispatch->Disable(pSrc->target);
pBlitter->pDispatch->DisableClientState(GL_TEXTURE_COORD_ARRAY);
pBlitter->pDispatch->DisableClientState(GL_VERTEX_ARRAY);
}
else
{
bool bUseSameVerticies = paSrcRect == paDstRect && normalX == 1 && normalY == 1 && srcHeight == dstHeight;
GLfloat *pVerticies;
GLfloat *pTexCoords;
GLubyte *pIndicies;
GLuint cElements = crBltVtGetNumVerticiesIT(cRects);
GLuint cIndicies = crBltVtGetNumIndiciesIT(cRects);
GLubyte iIdxBase = 0;
if (bUseSameVerticies)
{
pVerticies = (GLfloat*)crBltBufGet(&pBlitter->Verticies, cElements * 2 * sizeof (*pVerticies) + cIndicies * sizeof (*pIndicies));
crBltVtRectsITNormalized(paDstRect, cRects, normalX, normalY, pVerticies, &pIndicies, &iIdxBase, dstHeight);
pTexCoords = pVerticies;
}
else
{
pVerticies = (GLfloat*)crBltBufGet(&pBlitter->Verticies, cElements * 2 * 2 * sizeof (*pVerticies) + cIndicies * sizeof (*pIndicies));
pTexCoords = crBltVtRectsITNormalized(paDstRect, cRects, 1, 1, pVerticies, &pIndicies, &iIdxBase, dstHeight);
crBltVtRectsITNormalized(paSrcRect, cRects, normalX, normalY, pTexCoords, NULL, NULL, srcHeight);
}
pBlitter->pDispatch->EnableClientState(GL_VERTEX_ARRAY);
pBlitter->pDispatch->VertexPointer(2, GL_FLOAT, 0, pVerticies);
pBlitter->pDispatch->EnableClientState(GL_TEXTURE_COORD_ARRAY);
pBlitter->pDispatch->TexCoordPointer(2, GL_FLOAT, 0, pTexCoords);
pBlitter->pDispatch->Enable(pSrc->target);
pBlitter->pDispatch->DrawElements(GL_TRIANGLES, cIndicies, GL_UNSIGNED_BYTE, pIndicies);
pBlitter->pDispatch->Disable(pSrc->target);
pBlitter->pDispatch->DisableClientState(GL_TEXTURE_COORD_ARRAY);
pBlitter->pDispatch->DisableClientState(GL_VERTEX_ARRAY);
}
pBlitter->pDispatch->BindTexture(pSrc->target, 0);
return VINF_SUCCESS;
}
