diff options
author | Gerd Hoffmann <kraxel@redhat.com> | 2015-04-24 07:48:45 +0200 |
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committer | Gerd Hoffmann <kraxel@redhat.com> | 2015-05-05 10:43:03 +0200 |
commit | 985e1c9b008e5e8b6eac41546266d3abcfa6282a (patch) | |
tree | 5130bd7fcc53da40dc299ffb6899655fc6bdc313 | |
parent | d98bc0b654b97d130338e76e0928296f84e6d6fd (diff) |
opengl: add shader helper functions.
Helper functions to compile, link and run opengl shader programs.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
-rw-r--r-- | include/ui/shader.h | 9 | ||||
-rw-r--r-- | ui/Makefile.objs | 7 | ||||
-rw-r--r-- | ui/shader.c | 95 |
3 files changed, 111 insertions, 0 deletions
diff --git a/include/ui/shader.h b/include/ui/shader.h new file mode 100644 index 0000000000..e1b0caf796 --- /dev/null +++ b/include/ui/shader.h @@ -0,0 +1,9 @@ +#ifdef CONFIG_OPENGL +# include <GLES2/gl2.h> +# include <GLES2/gl2ext.h> +#endif + +GLuint qemu_gl_create_compile_shader(GLenum type, const GLchar *src); +GLuint qemu_gl_create_link_program(GLuint vert, GLuint frag); +GLuint qemu_gl_create_compile_link_program(const GLchar *vert_src, + const GLchar *frag_src); diff --git a/ui/Makefile.objs b/ui/Makefile.objs index 13b5cfbe41..7a76df578f 100644 --- a/ui/Makefile.objs +++ b/ui/Makefile.objs @@ -24,4 +24,11 @@ sdl.mo-objs := sdl2.o sdl2-input.o sdl2-2d.o endif sdl.mo-cflags := $(SDL_CFLAGS) +ifeq ($(CONFIG_OPENGL),y) +common-obj-y += shader.o +endif + gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS) +shader.o-cflags += $(OPENGL_CFLAGS) + +shader.o-libs += $(OPENGL_LIBS) diff --git a/ui/shader.c b/ui/shader.c new file mode 100644 index 0000000000..c3272d690b --- /dev/null +++ b/ui/shader.c @@ -0,0 +1,95 @@ +/* + * QEMU opengl shader helper functions + * + * Copyright (c) 2014 Red Hat + * + * Authors: + * Gerd Hoffmann <kraxel@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu-common.h" +#include "ui/shader.h" + +/* ---------------------------------------------------------------------- */ + +GLuint qemu_gl_create_compile_shader(GLenum type, const GLchar *src) +{ + GLuint shader; + GLint status, length; + char *errmsg; + + shader = glCreateShader(type); + glShaderSource(shader, 1, &src, 0); + glCompileShader(shader); + + glGetShaderiv(shader, GL_COMPILE_STATUS, &status); + if (!status) { + glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length); + errmsg = malloc(length); + glGetShaderInfoLog(shader, length, &length, errmsg); + fprintf(stderr, "%s: compile %s error\n%s\n", __func__, + (type == GL_VERTEX_SHADER) ? "vertex" : "fragment", + errmsg); + free(errmsg); + return 0; + } + return shader; +} + +GLuint qemu_gl_create_link_program(GLuint vert, GLuint frag) +{ + GLuint program; + GLint status, length; + char *errmsg; + + program = glCreateProgram(); + glAttachShader(program, vert); + glAttachShader(program, frag); + glLinkProgram(program); + + glGetProgramiv(program, GL_LINK_STATUS, &status); + if (!status) { + glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length); + errmsg = malloc(length); + glGetProgramInfoLog(program, length, &length, errmsg); + fprintf(stderr, "%s: link program: %s\n", __func__, errmsg); + free(errmsg); + return 0; + } + return program; +} + +GLuint qemu_gl_create_compile_link_program(const GLchar *vert_src, + const GLchar *frag_src) +{ + GLuint vert_shader, frag_shader, program; + + vert_shader = qemu_gl_create_compile_shader(GL_VERTEX_SHADER, vert_src); + frag_shader = qemu_gl_create_compile_shader(GL_FRAGMENT_SHADER, frag_src); + if (!vert_shader || !frag_shader) { + return 0; + } + + program = qemu_gl_create_link_program(vert_shader, frag_shader); + glDeleteShader(vert_shader); + glDeleteShader(frag_shader); + + return program; +} |