diff options
author | Gerd Hoffmann <kraxel@redhat.com> | 2015-01-09 11:40:23 +0100 |
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committer | Gerd Hoffmann <kraxel@redhat.com> | 2015-05-05 10:48:22 +0200 |
commit | cd2bc889e5b30c69926fc1511b6522e7cb4c705d (patch) | |
tree | 2e436873e72110ad1b22b5b4d84f409d6a05b5aa /ui | |
parent | 985e1c9b008e5e8b6eac41546266d3abcfa6282a (diff) |
console-gl: add opengl rendering helper functions
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'ui')
-rw-r--r-- | ui/Makefile.objs | 3 | ||||
-rw-r--r-- | ui/console-gl.c | 168 | ||||
-rw-r--r-- | ui/shader.c | 19 | ||||
-rw-r--r-- | ui/shader/texture-blit.frag | 10 | ||||
-rw-r--r-- | ui/shader/texture-blit.vert | 10 |
5 files changed, 210 insertions, 0 deletions
diff --git a/ui/Makefile.objs b/ui/Makefile.objs index 7a76df578f..67fe278c15 100644 --- a/ui/Makefile.objs +++ b/ui/Makefile.objs @@ -26,9 +26,12 @@ sdl.mo-cflags := $(SDL_CFLAGS) ifeq ($(CONFIG_OPENGL),y) common-obj-y += shader.o +common-obj-y += console-gl.o endif gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS) shader.o-cflags += $(OPENGL_CFLAGS) +console-gl.o-cflags += $(OPENGL_CFLAGS) shader.o-libs += $(OPENGL_LIBS) +console-gl.o-libs += $(OPENGL_LIBS) diff --git a/ui/console-gl.c b/ui/console-gl.c new file mode 100644 index 0000000000..cb45cf8a29 --- /dev/null +++ b/ui/console-gl.c @@ -0,0 +1,168 @@ +/* + * 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" + +#include "shader/texture-blit-vert.h" +#include "shader/texture-blit-frag.h" + +struct ConsoleGLState { + GLint texture_blit_prog; +}; + +/* ---------------------------------------------------------------------- */ + +ConsoleGLState *console_gl_init_context(void) +{ + ConsoleGLState *gls = g_new0(ConsoleGLState, 1); + + 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); + } + + return gls; +} + +void console_gl_fini_context(ConsoleGLState *gls) +{ + if (!gls) { + return; + } + g_free(gls); +} + +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; + } +} + +void surface_gl_create_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + assert(gls); + assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0); + + 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(); + } + + 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)); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); +} + +void surface_gl_update_texture(ConsoleGLState *gls, + DisplaySurface *surface, + int x, int y, int w, int h) +{ + uint8_t *data = (void *)surface_data(surface); + + assert(gls); + + 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); +} + +void surface_gl_render_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + assert(gls); + + glClearColor(0.1f, 0.1f, 0.1f, 0.0f); + glClear(GL_COLOR_BUFFER_BIT); + + qemu_gl_run_texture_blit(gls->texture_blit_prog); +} + +void surface_gl_destroy_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + if (!surface || !surface->texture) { + return; + } + glDeleteTextures(1, &surface->texture); + surface->texture = 0; +} + +void surface_gl_setup_viewport(ConsoleGLState *gls, + DisplaySurface *surface, + int ww, int wh) +{ + int gw, gh, stripe; + float sw, sh; + + assert(gls); + + gw = surface_width(surface); + gh = surface_height(surface); + + 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); + } +} diff --git a/ui/shader.c b/ui/shader.c index c3272d690b..52a4632930 100644 --- a/ui/shader.c +++ b/ui/shader.c @@ -29,6 +29,25 @@ /* ---------------------------------------------------------------------- */ +void qemu_gl_run_texture_blit(GLint texture_blit_prog) +{ + GLfloat in_position[] = { + -1, -1, + 1, -1, + -1, 1, + 1, 1, + }; + GLint l_position; + + glUseProgram(texture_blit_prog); + l_position = glGetAttribLocation(texture_blit_prog, "in_position"); + glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, in_position); + glEnableVertexAttribArray(l_position); + glDrawArrays(GL_TRIANGLE_STRIP, l_position, 4); +} + +/* ---------------------------------------------------------------------- */ + GLuint qemu_gl_create_compile_shader(GLenum type, const GLchar *src) { GLuint shader; diff --git a/ui/shader/texture-blit.frag b/ui/shader/texture-blit.frag new file mode 100644 index 0000000000..bfa202c22b --- /dev/null +++ b/ui/shader/texture-blit.frag @@ -0,0 +1,10 @@ + +#version 300 es + +uniform sampler2D image; +in mediump vec2 ex_tex_coord; +out mediump vec4 out_frag_color; + +void main(void) { + out_frag_color = texture(image, ex_tex_coord); +} diff --git a/ui/shader/texture-blit.vert b/ui/shader/texture-blit.vert new file mode 100644 index 0000000000..6fe2744d68 --- /dev/null +++ b/ui/shader/texture-blit.vert @@ -0,0 +1,10 @@ + +#version 300 es + +in vec2 in_position; +out vec2 ex_tex_coord; + +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; +} |