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Working on porting renderable text item to new code

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This commit is contained in:
Brad Davis 2015-02-03 22:11:24 -08:00
parent 9a6175a3b9
commit 77ce737f61
1 changed files with 14 additions and 39 deletions
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53
libraries/entities-renderer/src/RenderableTextEntityItem.cpp
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@ -26,6 +26,11 @@ EntityItem* RenderableTextEntityItem::factory(const EntityItemID& entityID, cons
return new RenderableTextEntityItem(entityID, properties);
}
glm::vec3 toGlm(const xColor & color) {
static const float MAX_COLOR = 255.0f;
return std::move(glm::vec3(color.red / MAX_COLOR, color.green / MAX_COLOR, color.blue / MAX_COLOR));
}
void RenderableTextEntityItem::render(RenderArgs* args) {
PerformanceTimer perfTimer("RenderableTextEntityItem::render");
assert(getType() == EntityTypes::Text);
@ -46,51 +51,21 @@ void RenderableTextEntityItem::render(RenderArgs* args) {
glm::vec3 axis = glm::axis(rotation);
glRotatef(glm::degrees(glm::angle(rotation)), axis.x, axis.y, axis.z);
const float MAX_COLOR = 255.0f;
xColor backgroundColor = getBackgroundColorX();
float alpha = 1.0f; //getBackgroundAlpha();
glm::vec4 color(backgroundColor.red / MAX_COLOR, backgroundColor.green / MAX_COLOR, backgroundColor.blue / MAX_COLOR, alpha);
const float SLIGHTLY_BEHIND = -0.005f;
static const float SLIGHTLY_BEHIND = -0.005f;
glm::vec3 topLeft(-halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND);
glm::vec3 bottomRight(halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND);
DependencyManager::get<GeometryCache>()->renderQuad(topLeft, bottomRight, color);
const int FIXED_FONT_SCALING_RATIO = FIXED_FONT_POINT_SIZE * 40.0f; // this is a ratio determined through experimentation
// Same font properties as textSize()
TextRenderer* textRenderer = TextRenderer::getInstance(SANS_FONT_FAMILY, FIXED_FONT_POINT_SIZE);
float maxHeight = (float)textRenderer->computeExtent("Xy").y * LINE_SCALE_RATIO;
float scaleFactor = (maxHeight / FIXED_FONT_SCALING_RATIO) * _lineHeight;
DependencyManager::get<GeometryCache>()->renderQuad(topLeft, bottomRight, glm::vec4(toGlm(getBackgroundColorX()), alpha));
TextRenderer* textRenderer = TextRenderer::getInstance(SANS_FONT_FAMILY, FIXED_FONT_POINT_SIZE / 2.0f);
glTranslatef(-(halfDimensions.x - leftMargin), halfDimensions.y - topMargin, 0.0f);
glm::vec2 clipMinimum(0.0f, 0.0f);
glm::vec2 clipDimensions((dimensions.x - (leftMargin + rightMargin)) / scaleFactor,
(dimensions.y - (topMargin + bottomMargin)) / scaleFactor);
glScalef(scaleFactor, -scaleFactor, 1.0);
enableClipPlane(GL_CLIP_PLANE0, -1.0f, 0.0f, 0.0f, clipMinimum.x + clipDimensions.x);
enableClipPlane(GL_CLIP_PLANE1, 1.0f, 0.0f, 0.0f, -clipMinimum.x);
enableClipPlane(GL_CLIP_PLANE2, 0.0f, -1.0f, 0.0f, clipMinimum.y + clipDimensions.y);
enableClipPlane(GL_CLIP_PLANE3, 0.0f, 1.0f, 0.0f, -clipMinimum.y);
xColor textColor = getTextColorX();
glm::vec4 textColorV4(textColor.red / MAX_COLOR, textColor.green / MAX_COLOR, textColor.blue / MAX_COLOR, 1.0f);
QStringList lines = _text.split("\n");
int lineOffset = maxHeight;
foreach(QString thisLine, lines) {
textRenderer->draw(0, lineOffset, qPrintable(thisLine), textColorV4);
lineOffset += maxHeight;
}
glDisable(GL_CLIP_PLANE0);
glDisable(GL_CLIP_PLANE1);
glDisable(GL_CLIP_PLANE2);
glDisable(GL_CLIP_PLANE3);
glm::vec4 textColor(toGlm(getTextColorX()), alpha);
// this is a ratio determined through experimentation
static const float testScaleFactor = 0.01f;
glScalef(testScaleFactor, -testScaleFactor, testScaleFactor);
textRenderer->draw(0, 0, _text, textColor);
}
glPopMatrix();
}