void DoBlit(IList <BlitInfo> blitInfos, int startIndex)
{
int usedSlots = Mathf.Min(blitInfos.Count - startIndex, k_TextureSlotCount);
int stopIndex = startIndex + usedSlots;
// Update the properties
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
var texture = blitInfos[blitIndex].src;
if (texture != null)
{
m_Properties.SetTexture(k_TextureIds[slotIndex], texture);
}
}
Utility.SetPropertyBlock(m_Properties);
// Draw
GL.Begin(GL.QUADS);
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
BlitInfo current = blitInfos[blitIndex];
float srcTexelWidth = 1f / current.src.width;
float srcTexelHeight = 1f / current.src.height;
// Destination coordinates (in integer pixels).
float dstLeft = current.dstPos.x - current.border;
float dstBottom = current.dstPos.y - current.border;
float dstRight = current.dstPos.x + current.srcRect.width + current.border;
float dstTop = current.dstPos.y + current.srcRect.height + current.border;
// Source coordinates (normalized 0..1).
float srcLeft = (current.srcRect.x - current.border) * srcTexelWidth;
float srcBottom = (current.srcRect.y - current.border) * srcTexelHeight;
float srcRight = (current.srcRect.xMax + current.border) * srcTexelWidth;
float srcTop = (current.srcRect.yMax + current.border) * srcTexelHeight;
// Bottom left
GL.Color(current.tint);
GL.TexCoord3(srcLeft, srcBottom, slotIndex);
GL.Vertex3(dstLeft, dstBottom, 0.0f);
// Top left
GL.Color(current.tint);
GL.TexCoord3(srcLeft, srcTop, slotIndex);
GL.Vertex3(dstLeft, dstTop, 0.0f);
// Top right
GL.Color(current.tint);
GL.TexCoord3(srcRight, srcTop, slotIndex);
GL.Vertex3(dstRight, dstTop, 0.0f);
// Bottom right
GL.Color(current.tint);
GL.TexCoord3(srcRight, srcBottom, slotIndex);
GL.Vertex3(dstRight, dstBottom, 0.0f);
}
GL.End();
}
private void DoBlit(IList <BlitInfo> blitInfos, int startIndex)
{
int stopIndex = Mathf.Min(startIndex + k_TextureSlotCount, blitInfos.Count);
// Bind and update the material.
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
var texture = blitInfos[blitIndex].src;
if (texture != null)
{
m_BlitMaterial.SetTexture(k_TextureIds[slotIndex], texture);
}
}
// Draw.
m_BlitMaterial.SetPass(0);
GL.Begin(GL.QUADS);
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
BlitInfo current = blitInfos[blitIndex];
// Pixel offset for the border in the destination texture:
float borderDstOffset = current.addBorder ? 1 : 0;
// UV offset used to create the border when reading the texture.
float borderSrcWidth = borderDstOffset / current.src.width;
float borderSrcHeight = borderDstOffset / current.src.height;
// Destination coordinates.
float dstLeft = current.x - borderDstOffset;
float dstBottom = current.y - borderDstOffset;
float dstRight = current.x + current.src.width + borderDstOffset;
float dstTop = current.y + current.src.height + borderDstOffset;
// Source coordinates.
float srcLeft = 0 - borderSrcWidth;
float srcBottom = 0 - borderSrcHeight;
float srcRight = 1 + borderSrcWidth;
float srcTop = 1 + borderSrcHeight;
// Bottom left
GL.TexCoord3(srcLeft, srcBottom, slotIndex);
GL.Vertex3(dstLeft, dstBottom, 0.0f);
// Top left
GL.TexCoord3(srcLeft, srcTop, slotIndex);
GL.Vertex3(dstLeft, dstTop, 0.0f);
// Top right
GL.TexCoord3(srcRight, srcTop, slotIndex);
GL.Vertex3(dstRight, dstTop, 0.0f);
// Bottom right
GL.TexCoord3(srcRight, srcBottom, slotIndex);
GL.Vertex3(dstRight, dstBottom, 0.0f);
}
GL.End();
}
/// <param name="x">Distance between the left of the atlas and the left boundary of the texture.</param>
/// <param name="y">Distance between the bottom of the atlas and the bottom boundary of the texture.</param>
/// <param name="addBorder">Blit a border using the texture wrap mode.</param>
private void BlitSingle(Texture src, RenderTexture dst, int x, int y, bool addBorder)
{
m_SingleBlit[0] = new BlitInfo {
src = src, x = x, y = y, addBorder = addBorder
};
BeginBlit(dst);
DoBlit(m_SingleBlit, 0);
EndBlit();
}
void DoBlit(IList <BlitInfo> blitInfos, int startIndex)
{
int stopIndex = Mathf.Min(startIndex + k_TextureSlotCount, blitInfos.Count);
// Bind and update the material.
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
var texture = blitInfos[blitIndex].src;
if (texture != null)
{
m_BlitMaterial.SetTexture(k_TextureIds[slotIndex], texture);
}
}
// Draw.
m_BlitMaterial.SetPass(0);
GL.Begin(GL.QUADS);
for (int blitIndex = startIndex, slotIndex = 0; blitIndex < stopIndex; ++blitIndex, ++slotIndex)
{
BlitInfo current = blitInfos[blitIndex];
float srcTexelWidth = 1f / current.src.width;
float srcTexelHeight = 1f / current.src.height;
// Destination coordinates (in integer pixels).
float dstLeft = current.dstPos.x - current.border;
float dstBottom = current.dstPos.y - current.border;
float dstRight = current.dstPos.x + current.srcRect.width + current.border;
float dstTop = current.dstPos.y + current.srcRect.height + current.border;
// Source coordinates (normalized 0..1).
float srcLeft = (current.srcRect.x - current.border) * srcTexelWidth;
float srcBottom = (current.srcRect.y - current.border) * srcTexelHeight;
float srcRight = (current.srcRect.xMax + current.border) * srcTexelWidth;
float srcTop = (current.srcRect.yMax + current.border) * srcTexelHeight;
// Bottom left
GL.TexCoord3(srcLeft, srcBottom, slotIndex);
GL.Vertex3(dstLeft, dstBottom, 0.0f);
// Top left
GL.TexCoord3(srcLeft, srcTop, slotIndex);
GL.Vertex3(dstLeft, dstTop, 0.0f);
// Top right
GL.TexCoord3(srcRight, srcTop, slotIndex);
GL.Vertex3(dstRight, dstTop, 0.0f);
// Bottom right
GL.TexCoord3(srcRight, srcBottom, slotIndex);
GL.Vertex3(dstRight, dstBottom, 0.0f);
}
GL.End();
}
public void BlitOneNow(RenderTexture dst, Texture src, RectInt srcRect, Vector2Int dstPos, bool addBorder, Color tint)
{
if (disposed)
{
DisposeHelper.NotifyDisposedUsed(this);
return;
}
m_SingleBlit[0] = new BlitInfo {
src = src, srcRect = srcRect, dstPos = dstPos, border = addBorder ? 1 : 0, tint = tint
};
BeginBlit(dst);
DoBlit(m_SingleBlit, 0);
EndBlit();
}
