void CGUITextureGLES::DrawQuad(const CRect &rect, color_t color, CBaseTexture *texture, const CRect *texCoords)
{
CRenderSystemGLES *renderSystem = dynamic_cast<CRenderSystemGLES*>(&CServiceBroker::GetRenderSystem());
if (texture)
{
texture->LoadToGPU();
texture->BindToUnit(0);
}
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND); // Turn Blending On
VerifyGLState();
GLubyte col[4];
GLfloat ver[4][3];
GLfloat tex[4][2];
GLubyte idx[4] = {0, 1, 3, 2}; //determines order of triangle strip
if (texture)
renderSystem->EnableGUIShader(SM_TEXTURE);
else
renderSystem->EnableGUIShader(SM_DEFAULT);
GLint posLoc = renderSystem->GUIShaderGetPos();
GLint tex0Loc = renderSystem->GUIShaderGetCoord0();
GLint uniColLoc= renderSystem->GUIShaderGetUniCol();
glVertexAttribPointer(posLoc, 3, GL_FLOAT, 0, 0, ver);
if (texture)
glVertexAttribPointer(tex0Loc, 2, GL_FLOAT, 0, 0, tex);
glEnableVertexAttribArray(posLoc);
if (texture)
glEnableVertexAttribArray(tex0Loc);
// Setup Colors
col[0] = (GLubyte)GET_R(color);
col[1] = (GLubyte)GET_G(color);
col[2] = (GLubyte)GET_B(color);
col[3] = (GLubyte)GET_A(color);
glUniform4f(uniColLoc, col[0] / 255.0f, col[1] / 255.0f, col[2] / 255.0f, col[3] / 255.0f);
ver[0][0] = ver[3][0] = rect.x1;
ver[0][1] = ver[1][1] = rect.y1;
ver[1][0] = ver[2][0] = rect.x2;
ver[2][1] = ver[3][1] = rect.y2;
ver[0][2] = ver[1][2] = ver[2][2] = ver[3][2]= 0;
if (texture)
{
// Setup texture coordinates
CRect coords = texCoords ? *texCoords : CRect(0.0f, 0.0f, 1.0f, 1.0f);
tex[0][0] = tex[3][0] = coords.x1;
tex[0][1] = tex[1][1] = coords.y1;
tex[1][0] = tex[2][0] = coords.x2;
tex[2][1] = tex[3][1] = coords.y2;
}
glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, idx);
glDisableVertexAttribArray(posLoc);
if (texture)
glDisableVertexAttribArray(tex0Loc);
renderSystem->DisableGUIShader();
}
