LookingGlass/client/renderers/EGL/fps.c
Geoffrey McRae 3e021f3a6b [client] use cmake to generate renderers/fonts/clipboards headers/code
This is in preperation of cmake options to enable/disable various
functionallity.
2019-03-28 19:56:14 +11:00

190 lines
4.5 KiB
C

/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
cahe terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fps.h"
#include "debug.h"
#include "utils.h"
#include "texture.h"
#include "shader.h"
#include "model.h"
#include <stdlib.h>
#include <string.h>
// these headers are auto generated by cmake
#include "fps.vert.h"
#include "fps.frag.h"
#include "fps_bg.frag.h"
struct EGL_FPS
{
const LG_Font * font;
LG_FontObj fontObj;
EGL_Texture * texture;
EGL_Shader * shader;
EGL_Shader * shaderBG;
EGL_Model * model;
bool ready;
float width, height;
// uniforms
GLint uScreen , uSize;
GLint uScreenBG, uSizeBG;
};
bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj)
{
*fps = (EGL_FPS *)malloc(sizeof(EGL_FPS));
if (!*fps)
{
DEBUG_ERROR("Failed to malloc EGL_FPS");
return false;
}
memset(*fps, 0, sizeof(EGL_FPS));
(*fps)->font = font;
(*fps)->fontObj = fontObj;
if (!egl_texture_init(&(*fps)->texture))
{
DEBUG_ERROR("Failed to initialize the fps texture");
return false;
}
if (!egl_shader_init(&(*fps)->shader))
{
DEBUG_ERROR("Failed to initialize the fps shader");
return false;
}
if (!egl_shader_init(&(*fps)->shaderBG))
{
DEBUG_ERROR("Failed to initialize the fps bg shader");
return false;
}
if (!egl_shader_compile((*fps)->shader,
b_shader_fps_vert, b_shader_fps_vert_size,
b_shader_fps_frag, b_shader_fps_frag_size))
{
DEBUG_ERROR("Failed to compile the fps shader");
return false;
}
if (!egl_shader_compile((*fps)->shaderBG,
b_shader_fps_vert , b_shader_fps_vert_size,
b_shader_fps_bg_frag, b_shader_fps_bg_frag_size))
{
DEBUG_ERROR("Failed to compile the fps shader");
return false;
}
(*fps)->uSize = egl_shader_get_uniform_location((*fps)->shader , "size" );
(*fps)->uScreen = egl_shader_get_uniform_location((*fps)->shader , "screen");
(*fps)->uSizeBG = egl_shader_get_uniform_location((*fps)->shaderBG, "size" );
(*fps)->uScreenBG = egl_shader_get_uniform_location((*fps)->shaderBG, "screen");
if (!egl_model_init(&(*fps)->model))
{
DEBUG_ERROR("Failed to initialize the fps model");
return false;
}
egl_model_set_default((*fps)->model);
egl_model_set_texture((*fps)->model, (*fps)->texture);
return true;
}
void egl_fps_free(EGL_FPS ** fps)
{
if (!*fps)
return;
egl_texture_free(&(*fps)->texture );
egl_shader_free (&(*fps)->shader );
egl_shader_free (&(*fps)->shaderBG);
egl_model_free (&(*fps)->model );
free(*fps);
*fps = NULL;
}
void egl_fps_update(EGL_FPS * fps, const float avgFPS, const float renderFPS)
{
char str[128];
snprintf(str, sizeof(str), "UPS: %8.4f, FPS: %8.4f", avgFPS, renderFPS);
LG_FontBitmap * bmp = fps->font->render(fps->fontObj, 0xffffff00, str);
if (!bmp)
{
DEBUG_ERROR("Failed to render fps text");
return;
}
egl_texture_setup(
fps->texture,
EGL_PF_BGRA,
bmp->width ,
bmp->height,
bmp->width * bmp->bpp,
false
);
egl_texture_update
(
fps->texture,
bmp->pixels
);
fps->width = bmp->width;
fps->height = bmp->height;
fps->ready = true;
fps->font->release(fps->fontObj, bmp);
}
void egl_fps_render(EGL_FPS * fps, const float scaleX, const float scaleY)
{
if (!fps->ready)
return;
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// render the background first
egl_shader_use(fps->shaderBG);
glUniform2f(fps->uScreenBG, scaleX , scaleY );
glUniform2f(fps->uSizeBG , fps->width, fps->height);
egl_model_render(fps->model);
// render the texture over the background
egl_shader_use(fps->shader);
glUniform2f(fps->uScreen, scaleX , scaleY );
glUniform2f(fps->uSize , fps->width, fps->height);
egl_model_render(fps->model);
glDisable(GL_BLEND);
}