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-rw-r--r--qemu/ui/console-gl.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/qemu/ui/console-gl.c b/qemu/ui/console-gl.c
new file mode 100644
index 000000000..cb45cf8a2
--- /dev/null
+++ b/qemu/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);
+ }
+}