GCanvas::GCanvas(int width, int height, uint32_t format, RedWindow *win,
RenderType rendertype,
PixmapCache& pixmap_cache, PaletteCache& palette_cache,
GlzDecoderWindow &glz_decoder_window, SurfacesCache &csurfaces)
: Canvas(pixmap_cache, palette_cache, glz_decoder_window, csurfaces)
, _pixmap (0)
, _textures_lost (false)
{
_pixmap = new RedPixmapGL(width, height,
RedDrawable::format_from_surface(format),
true, win, rendertype);
if (!(_canvas = gl_canvas_create(width, height,
SPICE_SURFACE_FMT_DEPTH(format),
&pixmap_cache.base,
&palette_cache.base,
&csurfaces,
&glz_decoder(),
&jpeg_decoder(),
&zlib_decoder()))) {
THROW("create canvas failed");
}
}
status_t _init_opengl(
display_manager_t* p_dspmgr,
const char* vertex_shader_path,
const char* fragment_shader_path,
size_t video_bits_per_pixel,
size_t video_width,
size_t video_height,
size_t depth_bits_per_pixel,
size_t depth_width,
size_t depth_height)
{
size_t index = 0;
char uniform_string[256] = {'\0'};
/* Initialize opengl to have two pixel buffers, one for video data from
* the kinect, and another for the depth data. Data types / formats here
* have to match those used when initializing the kinect. The pixel
* buffers offer fast streaming of data from the kinect to the graphics
* card */
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_COLOR);
//glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
glDisable(GL_DEPTH_TEST);
/* create video pixel streaming buffer */
for (index = 0; index < TEXTURE_CAPACITY; index++) {
p_dspmgr->gl_video_buffers[index] = gl_pixel_buffer_create(
video_width,
video_height,
GL_TEXTURE_2D,
/*
GL_RGBA,
GL_RGB,
*/
GL_RGB,
GL_RGB,
GL_UNSIGNED_BYTE,
video_bits_per_pixel / 8,
GL_DYNAMIC_DRAW);
if (NULL == p_dspmgr->gl_video_buffers[index]) {
LOG_ERROR("failed to create screen");
return -1;
}
}
/* create depth pixel streaming buffer */
for (index = 0; index < TEXTURE_CAPACITY; index++) {
p_dspmgr->gl_depth_buffers[index] = gl_pixel_buffer_create(
depth_width,
depth_height,
GL_TEXTURE_2D,
/* GL_RGBA,
GL_RED,
*/
GL_ALPHA,
GL_ALPHA,
GL_UNSIGNED_SHORT,
depth_bits_per_pixel / 8,
GL_DYNAMIC_DRAW);
if (NULL == p_dspmgr->gl_depth_buffers[index]) {
LOG_ERROR("failed to create screen");
return ERR_FAILED_CREATE;
}
}
/* create the canvas, which is simply a square in 3D space upon which the
* pixel buffers are drawn */
p_dspmgr->canvas = gl_canvas_create();
if (NULL == p_dspmgr->canvas) {
LOG_ERROR("failed to create canvas");
return ERR_FAILED_CREATE;
}
/* load customized shader programs which handle depth cutoff and masking
* of video data by depth data */
p_dspmgr->vertex_shader = gl_shader_load_file(
GL_VERTEX_SHADER,
vertex_shader_path);
if (p_dspmgr->vertex_shader == 0) {
LOG_ERROR("failed to load vertex shader");
return -1;
}
p_dspmgr->fragment_shader = gl_shader_load_file(
GL_FRAGMENT_SHADER,
fragment_shader_path);
if (p_dspmgr->fragment_shader == 0) {
LOG_ERROR("failed to load fragment shader");
return -1;
}
p_dspmgr->shader_program = gl_shader_program(
p_dspmgr->vertex_shader,
p_dspmgr->fragment_shader);
if (p_dspmgr->shader_program == 0) {
LOG_ERROR("failed to link shader program");
return -1;
}
/* get handles into shader program fro variables */
p_dspmgr->uniforms.count
= glGetUniformLocation(p_dspmgr->shader_program, "count");
p_dspmgr->uniforms.depth_horizontal_pixel_stride = glGetUniformLocation(
p_dspmgr->shader_program,
"depth_horizontal_pixel_stride");
p_dspmgr->uniforms.depth_vertical_pixel_stride = glGetUniformLocation(
p_dspmgr->shader_program,
"depth_vertical_pixel_stride");
p_dspmgr->attributes.position
= glGetAttribLocation(p_dspmgr->shader_program, "position");
/* check that these uniforms retrieved successfully */
if ((p_dspmgr->uniforms.count < 0) ||
(p_dspmgr->attributes.position < 0) ||
(p_dspmgr->uniforms.depth_vertical_pixel_stride < 0) ||
(p_dspmgr->uniforms.depth_horizontal_pixel_stride < 0))
{
LOG_ERROR(
"failed to get uniform/attribute locations from shaders");
return ERR_FAILED_CREATE;
}
/* get array of video textures, depth textures and depth cutoffs */
for (index = 0; index < TEXTURE_CAPACITY; index++) {
if (sprintf(uniform_string, "video_texture_%02i", (int)index) < 0) {
LOG_ERROR("failed to create string for uniform");
return ERR_FAILED_CREATE;
}
p_dspmgr->uniforms.video_textures[index]
= glGetUniformLocation(p_dspmgr->shader_program, uniform_string);
if (sprintf(uniform_string, "depth_texture_%02i", (int)index) < 0) {
LOG_ERROR("failed to create string for uniform");
return ERR_FAILED_CREATE;
}
p_dspmgr->uniforms.depth_textures[index]
= glGetUniformLocation(p_dspmgr->shader_program, uniform_string);
if (sprintf(uniform_string, "depth_cutoff_%02i", (int)index) < 0) {
LOG_ERROR("failed to create string for uniform");
return ERR_FAILED_CREATE;
}
p_dspmgr->uniforms.depth_cutoffs[index]
= glGetUniformLocation(p_dspmgr->shader_program, uniform_string);
if ((p_dspmgr->uniforms.video_textures[index] < 0) ||
(p_dspmgr->uniforms.depth_textures[index] < 0) ||
(p_dspmgr->uniforms.depth_cutoffs[index] < 0))
{
LOG_ERROR("failed to get uniform/attribute locations from shaders");
return ERR_FAILED_CREATE;
}
}
return NO_ERROR;
}