void CPostprocManager::ApplyBlurDownscale2x(GLuint inTex, GLuint outTex, int inWidth, int inHeight)
{
// Bind inTex to framebuffer for rendering.
pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_BloomFbo);
pglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, outTex, 0);
// Get bloom shader with instructions to simply copy texels.
CShaderDefines defines;
defines.Add(str_BLOOM_NOP, str_1);
CShaderTechniquePtr tech = g_Renderer.GetShaderManager().LoadEffect(str_bloom,
g_Renderer.GetSystemShaderDefines(), defines);
tech->BeginPass();
CShaderProgramPtr shader = tech->GetShader();
GLuint renderedTex = inTex;
// Cheat by creating high quality mipmaps for inTex, so the copying operation actually
// produces good scaling due to hardware filtering.
glBindTexture(GL_TEXTURE_2D, renderedTex);
pglGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
shader->BindTexture(str_renderedTex, renderedTex);
const SViewPort oldVp = g_Renderer.GetViewport();
const SViewPort vp = { 0, 0, inWidth / 2, inHeight / 2 };
g_Renderer.SetViewport(vp);
float quadVerts[] = {
1.0f, 1.0f,
-1.0f, 1.0f,
-1.0f, -1.0f,
-1.0f, -1.0f,
1.0f, -1.0f,
1.0f, 1.0f
};
float quadTex[] = {
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f
};
shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
shader->AssertPointersBound();
glDrawArrays(GL_TRIANGLES, 0, 6);
g_Renderer.SetViewport(oldVp);
tech->EndPass();
}
void CPostprocManager::ApplyBlurDownscale2x(GLuint inTex, GLuint outTex, int inWidth, int inHeight)
{
// Bind inTex to framebuffer for rendering.
pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_BloomFbo);
pglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, outTex, 0);
// Get bloom shader with instructions to simply copy texels.
CShaderDefines defines;
defines.Add(str_BLOOM_NOP, str_1);
CShaderTechniquePtr tech = g_Renderer.GetShaderManager().LoadEffect(str_bloom,
g_Renderer.GetSystemShaderDefines(), defines);
tech->BeginPass();
CShaderProgramPtr shader = tech->GetShader();
GLuint renderedTex = inTex;
// Cheat by creating high quality mipmaps for inTex, so the copying operation actually
// produces good scaling due to hardware filtering.
glBindTexture(GL_TEXTURE_2D, renderedTex);
pglGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
shader->BindTexture(str_renderedTex, renderedTex);
glPushAttrib(GL_VIEWPORT_BIT);
glViewport(0, 0, inWidth / 2, inHeight / 2);
glBegin(GL_QUADS);
glColor4f(1.f, 1.f, 1.f, 1.f);
glTexCoord2f(1.0, 1.0); glVertex2f(1,1);
glTexCoord2f(0.0, 1.0); glVertex2f(-1,1);
glTexCoord2f(0.0, 0.0); glVertex2f(-1,-1);
glTexCoord2f(1.0, 0.0); glVertex2f(1,-1);
glEnd();
glPopAttrib();
tech->EndPass();
}
