void hmd_common_swap(float center,
float scale,
const float *barrel_correction,
const float *chroma_correction)
{
int w = config_get_d(CONFIG_WIDTH);
int h = config_get_d(CONFIG_HEIGHT);
float a = (float) w / (float) h / 2;
/* Prepare to draw a screen-filling pair of rectangles. */
glBindFramebuffer_(GL_FRAMEBUFFER, 0);
glViewport(0, 0, w, h);
glDisable(GL_BLEND);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glUseProgram_(distortion.program);
{
/* Set distortion parameters for both eyes. */
glsl_uniform2f(&distortion, "ScaleOut", 0.5f / scale, 0.5f * a / scale);
glsl_uniform2f(&distortion, "ScaleIn", 2.0f, 2.0f / a);
glsl_uniform4f(&distortion, "DistortionK", barrel_correction[0],
barrel_correction[1],
barrel_correction[2],
barrel_correction[3]);
glsl_uniform4f(&distortion, "ChromAbParam", chroma_correction[0],
chroma_correction[1],
chroma_correction[2],
chroma_correction[3]);
/* Draw the left eye. */
glsl_uniform2f(&distortion, "LensCenter", 0.5f + 0.5f * center, 0.5f);
hmd_common_draw(L_fbo.color_texture, L_vbo);
/* Draw the right eye.*/
glsl_uniform2f(&distortion, "LensCenter", 0.5f - 0.5f * center, 0.5f);
hmd_common_draw(R_fbo.color_texture, R_vbo);
}
glUseProgram_(0);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glEnable(GL_BLEND);
}
GLAPI void APIENTRY glUseProgram(
GLuint program)
{
glUseProgram_(program);
}