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| author | Gerd Hoffmann <kraxel@redhat.com> | 2017-10-10 15:54:52 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-10-17 10:25:42 +0200 |
| commit | 0eb50c273766be80f0a6fde635c3a2bdabd199fb (patch) | |
| tree | 7df553d58c76cc5caecb8949d0d460fb24773874 | |
| parent | 86c0522c63e84ee9a98b9cd9cf6588faba1bac23 (diff) | |
| download | qemu-0eb50c273766be80f0a6fde635c3a2bdabd199fb.zip qemu-0eb50c273766be80f0a6fde635c3a2bdabd199fb.tar.gz qemu-0eb50c273766be80f0a6fde635c3a2bdabd199fb.tar.bz2 | |
egl-helpers: add egl_texture_blit and egl_texture_blend
egl_texture_blit() blits a texture, simliar to egl_fb_blit() but by
rendering the texture to the screen instead of using a framebuffer blit.
egl_texture_blend() renders a texture with alpha blending, will be used
to render the cursor to the screen.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-6-kraxel@redhat.com
| -rw-r--r-- | include/ui/egl-helpers.h | 4 | ||||
| -rw-r--r-- | ui/egl-helpers.c | 27 |
2 files changed, 31 insertions, 0 deletions
diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h index 4924fe5..747233c 100644 --- a/include/ui/egl-helpers.h +++ b/include/ui/egl-helpers.h @@ -24,6 +24,10 @@ void egl_fb_setup_new_tex(egl_fb *fb, int width, int height); void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip); void egl_fb_read(void *dst, egl_fb *src); +void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip); +void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip, + int x, int y); + #ifdef CONFIG_OPENGL_DMABUF extern int qemu_egl_rn_fd; diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c index e7ee337..5fa60ef 100644 --- a/ui/egl-helpers.c +++ b/ui/egl-helpers.c @@ -111,6 +111,33 @@ void egl_fb_read(void *dst, egl_fb *src) GL_BGRA, GL_UNSIGNED_BYTE, dst); } +void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip) +{ + glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer); + glViewport(0, 0, dst->width, dst->height); + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, src->texture); + qemu_gl_run_texture_blit(gls, flip); +} + +void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip, + int x, int y) +{ + glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer); + if (flip) { + glViewport(x, y, src->width, src->height); + } else { + glViewport(x, dst->height - src->height - y, + src->width, src->height); + } + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, src->texture); + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + qemu_gl_run_texture_blit(gls, flip); + glDisable(GL_BLEND); +} + /* ---------------------------------------------------------------------- */ #ifdef CONFIG_OPENGL_DMABUF |