void OpenGLRenderer::draw2DText(const Common::String &text, const Common::Point &position) {
OpenGLTexture *glFont = static_cast<OpenGLTexture *>(_font);
// The font only has uppercase letters
Common::String textToDraw = text;
textToDraw.toUppercase();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
glDepthMask(GL_FALSE);
glColor3f(1.0f, 1.0f, 1.0f);
glBindTexture(GL_TEXTURE_2D, glFont->id);
int x = position.x;
int y = position.y;
for (uint i = 0; i < textToDraw.size(); i++) {
Common::Rect textureRect = getFontCharacterRect(textToDraw[i]);
int w = textureRect.width();
int h = textureRect.height();
float cw = textureRect.width() / (float)glFont->internalWidth;
float ch = textureRect.height() / (float)glFont->internalHeight;
float cx = textureRect.left / (float)glFont->internalWidth;
float cy = textureRect.top / (float)glFont->internalHeight;
glBegin(GL_QUADS);
glTexCoord2f(cx, cy + ch);
glVertex3f(x, y, 1.0f);
glTexCoord2f(cx + cw, cy + ch);
glVertex3f(x + w, y, 1.0f);
glTexCoord2f(cx + cw, cy);
glVertex3f(x + w, y + h, 1.0f);
glTexCoord2f(cx, cy);
glVertex3f(x, y + h, 1.0f);
glEnd();
x += textureRect.width() - 3;
}
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
}
void TinyGLRenderer::draw2DText(const Common::String &text, const Common::Point &position) {
TinyGLTexture *glFont = static_cast<TinyGLTexture *>(_font);
// The font only has uppercase letters
Common::String textToDraw = text;
textToDraw.toUppercase();
tglEnable(TGL_BLEND);
tglBlendFunc(TGL_SRC_ALPHA, TGL_ONE_MINUS_SRC_ALPHA);
tglEnable(TGL_TEXTURE_2D);
tglDepthMask(TGL_FALSE);
tglColor3f(1.0f, 1.0f, 1.0f);
tglBindTexture(TGL_TEXTURE_2D, glFont->id);
int x = position.x;
int y = position.y;
for (uint i = 0; i < textToDraw.size(); i++) {
Common::Rect textureRect = getFontCharacterRect(textToDraw[i]);
int w = textureRect.width();
int h = textureRect.height();
Graphics::BlitTransform transform(x, y);
transform.sourceRectangle(textureRect.left, textureRect.top, w, h);
transform.flip(true, false);
Graphics::tglBlit(glFont->getBlitTexture(), transform);
x += textureRect.width() - 3;
}
tglDisable(TGL_TEXTURE_2D);
tglDisable(TGL_BLEND);
tglDepthMask(TGL_TRUE);
}
void ShaderRenderer::draw2DText(const Common::String &text, const Common::Point &position) {
OpenGLTexture *glFont = static_cast<OpenGLTexture *>(_font);
// The font only has uppercase letters
Common::String textToDraw = text;
textToDraw.toUppercase();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
if (_prevText != textToDraw || _prevTextPosition != position) {
_prevText = textToDraw;
_prevTextPosition = position;
float x = position.x / (float) _currentViewport.width();
float y = position.y / (float) _currentViewport.height();
float *bufData = new float[16 * textToDraw.size()];
float *cur = bufData;
for (uint i = 0; i < textToDraw.size(); i++) {
Common::Rect textureRect = getFontCharacterRect(textToDraw[i]);
float w = textureRect.width() / (float) _currentViewport.width();
float h = textureRect.height() / (float) _currentViewport.height();
float cw = textureRect.width() / (float)glFont->internalWidth;
float ch = textureRect.height() / (float)glFont->internalHeight;
float cx = textureRect.left / (float)glFont->internalWidth;
float cy = textureRect.top / (float)glFont->internalHeight;
const float charData[] = {
cx, cy + ch, x, y,
cx + cw, cy + ch, x + w, y,
cx + cw, cy, x + w, y + h,
cx, cy, x, y + h,
};
memcpy(cur, charData, 16 * sizeof(float));
cur += 16;
x += (textureRect.width() - 3) / (float) _currentViewport.width();
}
glBindBuffer(GL_ARRAY_BUFFER, _textVBO);
glBufferSubData(GL_ARRAY_BUFFER, 0, textToDraw.size() * 16 * sizeof(float), bufData);
delete[] bufData;
}
_textShader->use();
glBindTexture(GL_TEXTURE_2D, glFont->id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _quadEBO);
glDrawElements(GL_TRIANGLES, 6 * textToDraw.size(), GL_UNSIGNED_SHORT, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
}
