protected internal virtual bool copyStencilToTextureAlpha(IRenderingEngine re, int texWidth, int texHeight)
{
re.checkAndLogErrors(null);
if (stencilFboId == -1)
{
// Create a FBO
stencilFboId = re.genFramebuffer();
re.bindFramebuffer(pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DRAW_FRAMEBUFFER, stencilFboId);
// Create stencil texture and attach it to the FBO
stencilTextureId = re.genTexture();
re.bindTexture(stencilTextureId);
re.checkAndLogErrors("bindTexture");
re.setTexImage(0, stencilPixelFormat, TexImageWidth, TexImageHeight, stencilPixelFormat, stencilPixelFormat, 0, null);
if (re.checkAndLogErrors("setTexImage"))
{
return(false);
}
re.TextureMipmapMinFilter = TFLT_NEAREST;
re.TextureMipmapMagFilter = TFLT_NEAREST;
re.TextureMipmapMinLevel = 0;
re.TextureMipmapMaxLevel = 0;
re.setTextureWrapMode(TWRAP_WRAP_MODE_CLAMP, TWRAP_WRAP_MODE_CLAMP);
re.setFramebufferTexture(pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DRAW_FRAMEBUFFER, pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DEPTH_STENCIL_ATTACHMENT, stencilTextureId, 0);
if (re.checkAndLogErrors("setFramebufferTexture RE_STENCIL_ATTACHMENT"))
{
return(false);
}
// Attach the GE texture to the FBO as well
re.setFramebufferTexture(pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DRAW_FRAMEBUFFER, pspsharp.graphics.RE.IRenderingEngine_Fields.RE_COLOR_ATTACHMENT0, textureId, 0);
if (re.checkAndLogErrors("setFramebufferTexture RE_COLOR_ATTACHMENT0"))
{
return(false);
}
}
else
{
re.bindFramebuffer(pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DRAW_FRAMEBUFFER, stencilFboId);
}
// Copy screen stencil buffer to stencil texture:
// - read framebuffer is screen (0)
// - draw/write framebuffer is our stencil FBO (stencilFboId)
re.blitFramebuffer(0, 0, texWidth, texHeight, 0, 0, texWidth, texHeight, pspsharp.graphics.RE.IRenderingEngine_Fields.RE_STENCIL_BUFFER_BIT, GeCommands.TFLT_NEAREST);
if (re.checkAndLogErrors("blitFramebuffer"))
{
return(false);
}
re.bindTexture(stencilTextureId);
if (!re.setCopyRedToAlpha(true))
{
return(false);
}
// Draw the stencil texture and update only the alpha channel of the GE texture
drawTexture(re, 0, 0, width, height, true, false, false, false, true);
re.checkAndLogErrors("drawTexture");
// Reset the framebuffer to the default one
re.bindFramebuffer(pspsharp.graphics.RE.IRenderingEngine_Fields.RE_DRAW_FRAMEBUFFER, 0);
re.CopyRedToAlpha = false;
// Success
return(true);
}