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#include "GuiRenderer.h"
#include "igl.h"
#include "ifonts.h"
#include "ishaders.h"
#include "math/Matrix4.h"
namespace wxutil
{
GuiRenderer::GuiRenderer() :
_areaTopLeft(0,0),
_areaBottomRight(640, 480),
_ignoreVisibility(false)
{}
void GuiRenderer::setGui(const gui::IGuiPtr& gui)
{
_gui = gui;
}
void GuiRenderer::setVisibleArea(const Vector2& topLeft, const Vector2& bottomRight)
{
_areaTopLeft = topLeft;
_areaBottomRight = bottomRight;
}
void GuiRenderer::setIgnoreVisibility(bool ignoreVisibility)
{
_ignoreVisibility = ignoreVisibility;
}
void GuiRenderer::setWindowDefFilter(const std::string& windowDef)
{
_windowDefFilter = windowDef;
}
void GuiRenderer::render()
{
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// set up viewpoint
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Initialise the 2D projection matrix with: left, right, bottom, top, znear, zfar
glOrtho(_areaTopLeft[0], // left
_areaBottomRight[0], // right
_areaBottomRight[1], // bottom
_areaTopLeft[1], // top
-1, 1);
// Tell openGL to draw front and back of the polygons in textured mode
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (_gui != NULL)
{
// Fetch the desktop windowDef and render it
render(_gui->getDesktop());
}
glDisable(GL_BLEND);
}
void GuiRenderer::render(const gui::IGuiWindowDefPtr& window, bool ignoreFilter)
{
if (window == NULL) return;
if (!window->visible && !_ignoreVisibility) return;
if (!ignoreFilter && !_windowDefFilter.empty())
{
if (window->name == _windowDefFilter)
{
ignoreFilter = true; // this is the window we want, ignore filter from here on
}
else if (!window->findWindowDef(_windowDefFilter))
{
return; // filtered window is not even a child
}
}
Vector4 rect = window->rect;
Vector4 backcolor = window->backcolor;
if (backcolor[3] > 0)
{
glColor4dv(backcolor);
// Background quad
glBegin(GL_QUADS);
glVertex2d(rect[0], rect[1]); // Upper left
glVertex2d(rect[0] + rect[2], rect[1]); // Upper right
glVertex2d(rect[0] + rect[2], rect[1] + rect[3]); // Lower right
glVertex2d(rect[0], rect[1] + rect[3]); // Lower left
glEnd();
}
// Realise background shader if necessary
if (!window->background.getValue().empty() && window->backgroundShader == NULL)
{
window->backgroundShader = GlobalMaterialManager().getMaterial(window->background);
}
// Acquire the texture number of the active texture
Vector4 matcolor = window->matcolor;
if (window->backgroundShader != NULL && (matcolor[3] > 0 || _ignoreVisibility))
{
// Get the diffuse layer
TexturePtr tex;
window->backgroundShader->foreachLayer([&](const IShaderLayer::Ptr& layer)
{
if (layer->getType() == IShaderLayer::DIFFUSE)
{
// Found the diffuse
tex = layer->getTexture();
return false;
}
return true;
});
if (tex == NULL)
{
tex = window->backgroundShader->getEditorImage();
}
if (tex != NULL)
{
glBindTexture(GL_TEXTURE_2D, tex->getGLTexNum());
// Draw the textured quad
glColor4dv(matcolor);
// Render background image as opaque if _ignoreVisibility is set to true
if (_ignoreVisibility && matcolor[3] <= 0)
{
glColor4d(matcolor[0], matcolor[1], matcolor[2], 1);
}
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex2d(rect[0], rect[1]); // Upper left
glTexCoord2f(1,0);
glVertex2d(rect[0] + rect[2], rect[1]); // Upper right
glTexCoord2f(1,1);
glVertex2d(rect[0] + rect[2], rect[1] + rect[3]); // Lower right
glTexCoord2f(0,1);
glVertex2d(rect[0], rect[1] + rect[3]); // Lower left
glEnd();
glDisable(GL_TEXTURE_2D);
}
}
// Render the text
if (!window->text.getValue().empty())
{
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_TEXTURE_2D);
Vector4 forecolor = window->forecolor;
glColor4dv(forecolor);
// Render text as opaque if _ignoreVisibility is set to true
if (_ignoreVisibility && forecolor[3] <= 0)
{
glColor4d(forecolor[0], forecolor[1], forecolor[2], 1);
}
window->getRenderableText().render();
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
}
// Push the translation before rendering the children, so that they
// can continue rendering in local coordinates, but the results appear relative to
// this parent windowDef
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslated(rect[0], rect[1], 0);
for (const gui::IGuiWindowDefPtr& child : window->children)
{
render(child, ignoreFilter);
}
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
} // namespace
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