void OpenGL::setupContext()
{
if (!contextInitialized)
return;
initMaxValues();
GLfloat glcolor[4] = {1.0f, 1.0f, 1.0f, 1.0f};
glVertexAttrib4fv(ATTRIB_COLOR, glcolor);
glVertexAttrib4fv(ATTRIB_CONSTANTCOLOR, glcolor);
GLint maxvertexattribs = 1;
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &maxvertexattribs);
state.enabledAttribArrays = (uint32) ((1ull << uint32(maxvertexattribs)) - 1);
useVertexAttribArrays(0);
// Get the current viewport.
glGetIntegerv(GL_VIEWPORT, (GLint *) &state.viewport.x);
// And the current scissor - but we need to compensate for GL scissors
// starting at the bottom left instead of top left.
glGetIntegerv(GL_SCISSOR_BOX, (GLint *) &state.scissor.x);
state.scissor.y = state.viewport.h - (state.scissor.y + state.scissor.h);
if (GLAD_VERSION_1_0)
glGetFloatv(GL_POINT_SIZE, &state.pointSize);
else
state.pointSize = 1.0f;
if (GLAD_VERSION_3_0 || GLAD_ARB_framebuffer_sRGB || GLAD_EXT_framebuffer_sRGB
|| GLAD_EXT_sRGB_write_control)
{
state.framebufferSRGBEnabled = (glIsEnabled(GL_FRAMEBUFFER_SRGB) == GL_TRUE);
}
else
state.framebufferSRGBEnabled = false;
// Initialize multiple texture unit support for shaders.
state.boundTextures.clear();
state.boundTextures.resize(maxTextureUnits, 0);
for (int i = 0; i < (int) state.boundTextures.size(); i++)
{
glActiveTexture(GL_TEXTURE0 + i);
glBindTexture(GL_TEXTURE_2D, 0);
}
glActiveTexture(GL_TEXTURE0);
state.curTextureUnit = 0;
createDefaultTexture();
// Invalidate the cached matrices by setting some elements to NaN.
float nan = std::numeric_limits<float>::quiet_NaN();
state.lastProjectionMatrix.setTranslation(nan, nan);
state.lastTransformMatrix.setTranslation(nan, nan);
if (GLAD_VERSION_1_0)
glMatrixMode(GL_MODELVIEW);
contextInitialized = true;
}
BaseSurface::BaseSurface(){
_moved = false;
ofEnableNormalizedTexCoords();
createDefaultTexture();
}
