void
RAS_FramingManager::
ComputeBestFitViewRect(
const RAS_Rect &availableViewport,
const float design_aspect_ratio,
RAS_Rect &viewport
){
// try and honour the aspect ratio when setting the
// drawable area. If we don't do this we are liable
// to get a lot of distortion in the rendered image.
int width = availableViewport.GetWidth();
int height = availableViewport.GetHeight();
float window_aspect = float(width)/float(height);
if (window_aspect < design_aspect_ratio) {
int v_height = (int)(width / design_aspect_ratio);
int left_over = (height - v_height) / 2;
viewport.SetLeft(availableViewport.GetLeft());
viewport.SetBottom(availableViewport.GetBottom() + left_over);
viewport.SetRight(availableViewport.GetLeft() + width);
viewport.SetTop(availableViewport.GetBottom() + left_over + v_height);
} else {
int v_width = (int)(height * design_aspect_ratio);
int left_over = (width - v_width) / 2;
viewport.SetLeft(availableViewport.GetLeft() + left_over);
viewport.SetBottom(availableViewport.GetBottom());
viewport.SetRight(availableViewport.GetLeft() + v_width + left_over);
viewport.SetTop(availableViewport.GetBottom() + height);
}
}
void
RAS_FramingManager::
ComputeViewport(
const RAS_FrameSettings &settings,
const RAS_Rect &availableViewport,
RAS_Rect &viewport
){
RAS_FrameSettings::RAS_FrameType type = settings.FrameType();
const int winx = availableViewport.GetWidth();
const int winy = availableViewport.GetHeight();
const float design_width = float(settings.DesignAspectWidth());
const float design_height = float(settings.DesignAspectHeight());
float design_aspect_ratio = float(1);
if (design_height == float(0)) {
// well this is ill defined
// lets just scale the thing
type = RAS_FrameSettings::e_frame_scale;
} else {
design_aspect_ratio = design_width/design_height;
}
switch (type) {
case RAS_FrameSettings::e_frame_scale :
case RAS_FrameSettings::e_frame_extend:
{
viewport.SetLeft(availableViewport.GetLeft());
viewport.SetBottom(availableViewport.GetBottom());
viewport.SetRight(availableViewport.GetLeft() + int(winx));
viewport.SetTop(availableViewport.GetBottom() + int(winy));
break;
}
case RAS_FrameSettings::e_frame_bars:
{
ComputeBestFitViewRect(
availableViewport,
design_aspect_ratio,
viewport
);
break;
}
default :
break;
}
}
// constructor
ImageViewport::ImageViewport (PyRASOffScreen *offscreen) : m_alpha(false), m_texInit(false)
{
// get viewport rectangle
if (offscreen) {
m_viewport[0] = 0;
m_viewport[1] = 0;
m_viewport[2] = offscreen->ofs->GetWidth();
m_viewport[3] = offscreen->ofs->GetHeight();
}
else {
RAS_Rect rect = KX_GetActiveEngine()->GetCanvas()->GetWindowArea();
m_viewport[0] = rect.GetLeft();
m_viewport[1] = rect.GetBottom();
m_viewport[2] = rect.GetWidth();
m_viewport[3] = rect.GetHeight();
}
//glGetIntegerv(GL_VIEWPORT, m_viewport);
// create buffer for viewport image
// Warning: this buffer is also used to get the depth buffer as an array of
// float (1 float = 4 bytes per pixel)
m_viewportImage = new BYTE [4 * getViewportSize()[0] * getViewportSize()[1]];
// set attributes
setWhole((offscreen) ? true : false);
}
// constructor
ImageViewport::ImageViewport (void) : m_alpha(false), m_texInit(false)
{
// get viewport rectangle
RAS_Rect rect = KX_GetActiveEngine()->GetCanvas()->GetWindowArea();
m_viewport[0] = rect.GetLeft();
m_viewport[1] = rect.GetBottom();
m_viewport[2] = rect.GetWidth();
m_viewport[3] = rect.GetHeight();
//glGetIntegerv(GL_VIEWPORT, m_viewport);
// create buffer for viewport image
m_viewportImage = new BYTE [4 * getViewportSize()[0] * getViewportSize()[1]];
// set attributes
setWhole(false);
}
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();
}