void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
{
bool need_depth=false;
bool need_luminance=false;
int num_filters = 0;
int passindex;
if(!isshadersupported)
return;
for(passindex =0; passindex<MAX_RENDER_PASS; passindex++)
{
if(m_filters[passindex] && m_enabled[passindex]){
num_filters ++;
if(texflag[passindex] & 0x1)
need_depth = true;
if(texflag[passindex] & 0x2)
need_luminance = true;
if(need_depth && need_luminance)
break;
}
}
if(num_filters <= 0)
return;
GLuint viewport[4]={0};
glGetIntegerv(GL_VIEWPORT,(GLint *)viewport);
if(canvaswidth != canvas->GetWidth() || canvasheight != canvas->GetHeight())
{
UpdateOffsetMatrix(canvas);
UpdateCanvasTextureCoord((unsigned int*)viewport);
need_tex_update = true;
}
if(need_tex_update)
{
SetupTextures(need_depth, need_luminance);
need_tex_update = false;
}
if(need_depth){
glActiveTextureARB(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texname[1]);
glCopyTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT, 0, 0, texturewidth,textureheight, 0);
}
if(need_luminance){
glActiveTextureARB(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, texname[2]);
glCopyTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE16, 0, 0, texturewidth,textureheight, 0);
}
// reverting to texunit 0, without this we get bug [#28462]
glActiveTextureARB(GL_TEXTURE0);
glViewport(0,0, texturewidth, textureheight);
glDisable(GL_DEPTH_TEST);
// if the last rendered face had alpha add it would messes with the color of the plane we apply 2DFilter to
glDisable(GL_BLEND);
glPushMatrix(); //GL_MODELVIEW
glLoadIdentity(); // GL_MODELVIEW
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
for(passindex =0; passindex<MAX_RENDER_PASS; passindex++)
{
if(m_filters[passindex] && m_enabled[passindex])
{
StartShaderProgram(passindex);
glActiveTextureARB(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texname[0]);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 0, 0, texturewidth, textureheight, 0);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_QUADS);
glColor4f(1.f, 1.f, 1.f, 1.f);
glTexCoord2f(1.0, 1.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[1], canvascoord[3]); glVertex2f(1,1);
glTexCoord2f(0.0, 1.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[0], canvascoord[3]); glVertex2f(-1,1);
glTexCoord2f(0.0, 0.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[0], canvascoord[2]); glVertex2f(-1,-1);
glTexCoord2f(1.0, 0.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[1], canvascoord[2]); glVertex2f(1,-1);
glEnd();
}
}
glEnable(GL_DEPTH_TEST);
glViewport(viewport[0],viewport[1],viewport[2],viewport[3]);
EndShaderProgram();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
{
bool need_depth=false;
bool need_luminance=false;
int num_filters = 0;
int passindex;
if (!isshadersupported)
return;
for (passindex =0; passindex<MAX_RENDER_PASS; passindex++)
{
if (m_filters[passindex] && m_enabled[passindex]) {
num_filters ++;
if (texflag[passindex] & 0x1)
need_depth = true;
if (texflag[passindex] & 0x2)
need_luminance = true;
if (need_depth && need_luminance)
break;
}
}
if (num_filters <= 0)
return;
const int *viewport = canvas->GetViewPort();
RAS_Rect rect = canvas->GetWindowArea();
int rect_width = rect.GetWidth()+1, rect_height = rect.GetHeight()+1;
if (texturewidth != rect_width || textureheight != rect_height)
{
UpdateOffsetMatrix(canvas);
UpdateCanvasTextureCoord(viewport);
need_tex_update = true;
}
if (need_tex_update)
{
SetupTextures(need_depth, need_luminance);
need_tex_update = false;
}
if (need_depth) {
glActiveTextureARB(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texname[1]);
glCopyTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0);
}
if (need_luminance) {
glActiveTextureARB(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, texname[2]);
glCopyTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE16, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0);
}
// reverting to texunit 0, without this we get bug [#28462]
glActiveTextureARB(GL_TEXTURE0);
canvas->SetViewPort(0, 0, rect_width-1, rect_height-1);
// We do this to make side-by-side stereo rendering work correctly with 2D filters. It would probably be nicer to just set the viewport,
// but it can be easier for writing shaders to have the coordinates for the whole screen instead of just part of the screen.
RAS_Rect scissor_rect = canvas->GetDisplayArea();
glScissor(scissor_rect.GetLeft() + viewport[0],
scissor_rect.GetBottom() + viewport[1],
scissor_rect.GetWidth() + 1,
scissor_rect.GetHeight() + 1);
glDisable(GL_DEPTH_TEST);
// in case the previous material was wire
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// if the last rendered face had alpha add it would messes with the color of the plane we apply 2DFilter to
glDisable(GL_BLEND);
// fix for [#34523] alpha buffer is now available for all OSs
glDisable(GL_ALPHA_TEST);
glPushMatrix(); //GL_MODELVIEW
glLoadIdentity(); // GL_MODELVIEW
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
for (passindex =0; passindex<MAX_RENDER_PASS; passindex++)
{
if (m_filters[passindex] && m_enabled[passindex])
{
StartShaderProgram(passindex);
glActiveTextureARB(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texname[0]);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0); // Don't use texturewidth and textureheight in case we don't have NPOT support
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_QUADS);
glColor4f(1.f, 1.f, 1.f, 1.f);
glTexCoord2f(1.0, 1.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[1], canvascoord[3]); glVertex2f(1,1);
glTexCoord2f(0.0, 1.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[0], canvascoord[3]); glVertex2f(-1,1);
glTexCoord2f(0.0, 0.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[0], canvascoord[2]); glVertex2f(-1,-1);
glTexCoord2f(1.0, 0.0); glMultiTexCoord2fARB(GL_TEXTURE3_ARB, canvascoord[1], canvascoord[2]); glVertex2f(1,-1);
glEnd();
}
}
glEnable(GL_DEPTH_TEST);
//We can't pass the results of canvas->GetViewPort() directly because canvas->SetViewPort() does some extra math [#34517]
canvas->SetViewPort(0, 0, viewport[2]-1, viewport[3]-1);
EndShaderProgram();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}