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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2013 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Jason Wilkins
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file source/blender/gpu/intern/gpu_font.c
* \ingroup gpu
*/
/* my interface */
#include "intern/gpu_font_intern.h"
/* my library */
#include "GPU_blender_aspect.h"
#include "GPU_extensions.h"
#include "GPU_safety.h"
/* internal */
#include "intern/gpu_common_intern.h"
#include "intern/gpu_matrix_intern.h"
/* external */
#include "BLI_dynstr.h"
#include "BLI_utildefines.h"
#include "MEM_guardedalloc.h"
static struct GPUShader* FONT_SHADER = NULL;
static struct GPUcommon FONT_COMMON = {0};
static bool FONT_FAILED = false;
#if GPU_SAFETY
static bool FONT_BEGUN = false;
#endif
void gpu_font_init(void)
{
FONT_SHADER = NULL;
}
void gpu_font_exit(void)
{
GPU_shader_free(FONT_SHADER);
#if GPU_SAFETY
FONT_BEGUN = false;
#endif
}
static void gpu_font_shader(void)
{
/* GLSL code */
extern const char datatoc_gpu_shader_font_vert_glsl[];
extern const char datatoc_gpu_shader_font_frag_glsl[];
/* Create shader if it doesn't exist yet. */
if (FONT_SHADER != NULL) {
GPU_shader_bind(FONT_SHADER);
gpu_set_common(&FONT_COMMON);
}
else if (!FONT_FAILED) {
DynStr* vert = BLI_dynstr_new();
DynStr* frag = BLI_dynstr_new();
DynStr* defs = BLI_dynstr_new();
char* vert_cstring;
char* frag_cstring;
char* defs_cstring;
gpu_include_common_vert(vert);
BLI_dynstr_append(vert, datatoc_gpu_shader_font_vert_glsl);
gpu_include_common_frag(frag);
BLI_dynstr_append(frag, datatoc_gpu_shader_font_frag_glsl);
gpu_include_common_defs(defs);
BLI_dynstr_append(defs, "#define USE_TEXTURE_2D\n");
vert_cstring = BLI_dynstr_get_cstring(vert);
frag_cstring = BLI_dynstr_get_cstring(frag);
defs_cstring = BLI_dynstr_get_cstring(defs);
FONT_SHADER =
GPU_shader_create("Font", vert_cstring, frag_cstring, NULL, defs_cstring);
MEM_freeN(vert_cstring);
MEM_freeN(frag_cstring);
MEM_freeN(defs_cstring);
BLI_dynstr_free(vert);
BLI_dynstr_free(frag);
BLI_dynstr_free(defs);
if (FONT_SHADER != NULL) {
gpu_common_get_symbols(&FONT_COMMON, FONT_SHADER);
gpu_set_common(&FONT_COMMON);
GPU_shader_bind(FONT_SHADER);
}
else {
FONT_FAILED = true;
gpu_set_common(NULL);
}
}
else {
gpu_set_common(NULL);
}
}
/* Bind / Unbind */
void gpu_font_bind(void)
{
bool glsl_support = GPU_glsl_support();
GPU_ASSERT(FONT_BEGUN);
if (glsl_support)
gpu_font_shader();
#if defined(WITH_GL_PROFILE_COMPAT)
if (!glsl_support)
GPU_CHECK(glEnable(GL_TEXTURE_2D));
#endif
gpu_commit_matrix();
}
void gpu_font_unbind(void)
{
bool glsl_support = GPU_glsl_support();
GPU_ASSERT(FONT_BEGUN);
if (glsl_support)
GPU_shader_unbind();
#if defined(WITH_GL_PROFILE_COMPAT)
if (!glsl_support)
GPU_CHECK(glDisable(GL_TEXTURE_2D));
#endif
}
void GPU_font_begin(void)
{
#if GPU_SAFETY
GPU_ASSERT(!FONT_BEGUN);
FONT_BEGUN = true;
#endif
GPU_aspect_end(); /* assuming was GPU_ASPECT_BASIC */
GPU_aspect_begin(GPU_ASPECT_FONT, 0);
}
void GPU_font_end(void)
{
#if GPU_SAFETY
GPU_ASSERT(FONT_BEGUN);
#endif
GPU_aspect_end();
#if GPU_SAFETY
FONT_BEGUN = false;
#endif
GPU_aspect_begin(GPU_ASPECT_BASIC, 0);
}
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