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console-gl: add opengl rendering helper functions
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
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Original file line number | Diff line number | Diff line change |
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/* | ||
* QEMU graphical console -- opengl helper bits | ||
* | ||
* 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/console.h" | ||
#include "ui/shader.h" | ||
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#include "shader/texture-blit-vert.h" | ||
#include "shader/texture-blit-frag.h" | ||
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struct ConsoleGLState { | ||
GLint texture_blit_prog; | ||
}; | ||
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/* ---------------------------------------------------------------------- */ | ||
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ConsoleGLState *console_gl_init_context(void) | ||
{ | ||
ConsoleGLState *gls = g_new0(ConsoleGLState, 1); | ||
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gls->texture_blit_prog = qemu_gl_create_compile_link_program | ||
(texture_blit_vert_src, texture_blit_frag_src); | ||
if (!gls->texture_blit_prog) { | ||
exit(1); | ||
} | ||
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return gls; | ||
} | ||
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void console_gl_fini_context(ConsoleGLState *gls) | ||
{ | ||
if (!gls) { | ||
return; | ||
} | ||
g_free(gls); | ||
} | ||
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bool console_gl_check_format(DisplayChangeListener *dcl, | ||
pixman_format_code_t format) | ||
{ | ||
switch (format) { | ||
case PIXMAN_BE_b8g8r8x8: | ||
case PIXMAN_BE_b8g8r8a8: | ||
case PIXMAN_r5g6b5: | ||
return true; | ||
default: | ||
return false; | ||
} | ||
} | ||
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void surface_gl_create_texture(ConsoleGLState *gls, | ||
DisplaySurface *surface) | ||
{ | ||
assert(gls); | ||
assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0); | ||
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switch (surface->format) { | ||
case PIXMAN_BE_b8g8r8x8: | ||
case PIXMAN_BE_b8g8r8a8: | ||
surface->glformat = GL_BGRA_EXT; | ||
surface->gltype = GL_UNSIGNED_BYTE; | ||
break; | ||
case PIXMAN_r5g6b5: | ||
surface->glformat = GL_RGB; | ||
surface->gltype = GL_UNSIGNED_SHORT_5_6_5; | ||
break; | ||
default: | ||
g_assert_not_reached(); | ||
} | ||
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glGenTextures(1, &surface->texture); | ||
glEnable(GL_TEXTURE_2D); | ||
glBindTexture(GL_TEXTURE_2D, surface->texture); | ||
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, | ||
surface_stride(surface) / surface_bytes_per_pixel(surface)); | ||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, | ||
surface_width(surface), | ||
surface_height(surface), | ||
0, surface->glformat, surface->gltype, | ||
surface_data(surface)); | ||
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); | ||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); | ||
} | ||
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void surface_gl_update_texture(ConsoleGLState *gls, | ||
DisplaySurface *surface, | ||
int x, int y, int w, int h) | ||
{ | ||
uint8_t *data = (void *)surface_data(surface); | ||
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assert(gls); | ||
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glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, | ||
surface_stride(surface) / surface_bytes_per_pixel(surface)); | ||
glTexSubImage2D(GL_TEXTURE_2D, 0, | ||
x, y, w, h, | ||
surface->glformat, surface->gltype, | ||
data + surface_stride(surface) * y | ||
+ surface_bytes_per_pixel(surface) * x); | ||
} | ||
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void surface_gl_render_texture(ConsoleGLState *gls, | ||
DisplaySurface *surface) | ||
{ | ||
assert(gls); | ||
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glClearColor(0.1f, 0.1f, 0.1f, 0.0f); | ||
glClear(GL_COLOR_BUFFER_BIT); | ||
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qemu_gl_run_texture_blit(gls->texture_blit_prog); | ||
} | ||
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void surface_gl_destroy_texture(ConsoleGLState *gls, | ||
DisplaySurface *surface) | ||
{ | ||
if (!surface || !surface->texture) { | ||
return; | ||
} | ||
glDeleteTextures(1, &surface->texture); | ||
surface->texture = 0; | ||
} | ||
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void surface_gl_setup_viewport(ConsoleGLState *gls, | ||
DisplaySurface *surface, | ||
int ww, int wh) | ||
{ | ||
int gw, gh, stripe; | ||
float sw, sh; | ||
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assert(gls); | ||
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gw = surface_width(surface); | ||
gh = surface_height(surface); | ||
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sw = (float)ww/gw; | ||
sh = (float)wh/gh; | ||
if (sw < sh) { | ||
stripe = wh - wh*sw/sh; | ||
glViewport(0, stripe / 2, ww, wh - stripe); | ||
} else { | ||
stripe = ww - ww*sh/sw; | ||
glViewport(stripe / 2, 0, ww - stripe, wh); | ||
} | ||
} |
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#version 300 es | ||
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uniform sampler2D image; | ||
in mediump vec2 ex_tex_coord; | ||
out mediump vec4 out_frag_color; | ||
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void main(void) { | ||
out_frag_color = texture(image, ex_tex_coord); | ||
} |
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#version 300 es | ||
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in vec2 in_position; | ||
out vec2 ex_tex_coord; | ||
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void main(void) { | ||
gl_Position = vec4(in_position, 0.0, 1.0); | ||
ex_tex_coord = vec2(1.0 + in_position.x, 1.0 - in_position.y) * 0.5; | ||
} |