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target/s390x: Fix assertion failure in VFMIN/VFMAX with type 13
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1/*
2 * QEMU opengl shader helper functions
3 *
4 * Copyright (c) 2014 Red Hat
5 *
6 * Authors:
7 * Gerd Hoffmann <kraxel@redhat.com>
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
e16f4c87 27#include "qemu/osdep.h"
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28#include "ui/shader.h"
29
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30#include "ui/shader/texture-blit-vert.h"
31#include "ui/shader/texture-blit-flip-vert.h"
32#include "ui/shader/texture-blit-frag.h"
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33
34struct QemuGLShader {
35 GLint texture_blit_prog;
2e1d70b9 36 GLint texture_blit_flip_prog;
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37 GLint texture_blit_vao;
38};
39
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40/* ---------------------------------------------------------------------- */
41
46e19e14 42static GLuint qemu_gl_init_texture_blit(GLint texture_blit_prog)
cd2bc889 43{
c046d828 44 static const GLfloat in_position[] = {
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45 -1, -1,
46 1, -1,
47 -1, 1,
48 1, 1,
49 };
50 GLint l_position;
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51 GLuint vao, buffer;
52
53 glGenVertexArrays(1, &vao);
54 glBindVertexArray(vao);
55
56 /* this is the VBO that holds the vertex data */
57 glGenBuffers(1, &buffer);
58 glBindBuffer(GL_ARRAY_BUFFER, buffer);
59 glBufferData(GL_ARRAY_BUFFER, sizeof(in_position), in_position,
60 GL_STATIC_DRAW);
cd2bc889 61
cd2bc889 62 l_position = glGetAttribLocation(texture_blit_prog, "in_position");
c046d828 63 glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, 0);
cd2bc889 64 glEnableVertexAttribArray(l_position);
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65
66 glBindBuffer(GL_ARRAY_BUFFER, 0);
67 glBindVertexArray(0);
68
69 return vao;
70}
71
2e1d70b9 72void qemu_gl_run_texture_blit(QemuGLShader *gls, bool flip)
c046d828 73{
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74 glUseProgram(flip
75 ? gls->texture_blit_flip_prog
76 : gls->texture_blit_prog);
46e19e14 77 glBindVertexArray(gls->texture_blit_vao);
c046d828 78 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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79}
80
81/* ---------------------------------------------------------------------- */
82
46e19e14 83static GLuint qemu_gl_create_compile_shader(GLenum type, const GLchar *src)
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84{
85 GLuint shader;
86 GLint status, length;
87 char *errmsg;
88
89 shader = glCreateShader(type);
90 glShaderSource(shader, 1, &src, 0);
91 glCompileShader(shader);
92
93 glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
94 if (!status) {
95 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
42ddb8aa 96 errmsg = g_malloc(length);
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97 glGetShaderInfoLog(shader, length, &length, errmsg);
98 fprintf(stderr, "%s: compile %s error\n%s\n", __func__,
99 (type == GL_VERTEX_SHADER) ? "vertex" : "fragment",
100 errmsg);
42ddb8aa 101 g_free(errmsg);
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102 return 0;
103 }
104 return shader;
105}
106
46e19e14 107static GLuint qemu_gl_create_link_program(GLuint vert, GLuint frag)
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108{
109 GLuint program;
110 GLint status, length;
111 char *errmsg;
112
113 program = glCreateProgram();
114 glAttachShader(program, vert);
115 glAttachShader(program, frag);
116 glLinkProgram(program);
117
118 glGetProgramiv(program, GL_LINK_STATUS, &status);
119 if (!status) {
120 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
42ddb8aa 121 errmsg = g_malloc(length);
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122 glGetProgramInfoLog(program, length, &length, errmsg);
123 fprintf(stderr, "%s: link program: %s\n", __func__, errmsg);
42ddb8aa 124 g_free(errmsg);
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125 return 0;
126 }
127 return program;
128}
129
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130static GLuint qemu_gl_create_compile_link_program(const GLchar *vert_src,
131 const GLchar *frag_src)
985e1c9b 132{
8fe496ad 133 GLuint vert_shader, frag_shader, program = 0;
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134
135 vert_shader = qemu_gl_create_compile_shader(GL_VERTEX_SHADER, vert_src);
136 frag_shader = qemu_gl_create_compile_shader(GL_FRAGMENT_SHADER, frag_src);
137 if (!vert_shader || !frag_shader) {
8fe496ad 138 goto end;
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139 }
140
141 program = qemu_gl_create_link_program(vert_shader, frag_shader);
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142
143end:
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144 glDeleteShader(vert_shader);
145 glDeleteShader(frag_shader);
146
147 return program;
148}
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149
150/* ---------------------------------------------------------------------- */
151
152QemuGLShader *qemu_gl_init_shader(void)
153{
154 QemuGLShader *gls = g_new0(QemuGLShader, 1);
155
156 gls->texture_blit_prog = qemu_gl_create_compile_link_program
157 (texture_blit_vert_src, texture_blit_frag_src);
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158 gls->texture_blit_flip_prog = qemu_gl_create_compile_link_program
159 (texture_blit_flip_vert_src, texture_blit_frag_src);
160 if (!gls->texture_blit_prog || !gls->texture_blit_flip_prog) {
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161 exit(1);
162 }
163
164 gls->texture_blit_vao =
165 qemu_gl_init_texture_blit(gls->texture_blit_prog);
166
167 return gls;
168}
169
170void qemu_gl_fini_shader(QemuGLShader *gls)
171{
172 if (!gls) {
173 return;
174 }
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175 glDeleteProgram(gls->texture_blit_prog);
176 glDeleteProgram(gls->texture_blit_flip_prog);
177 glDeleteProgram(gls->texture_blit_vao);
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178 g_free(gls);
179}