diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2017-10-10 15:54:50 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-10-17 10:25:42 +0200 |
| commit | 2e1d70b9e03ca3f1c6185b54010bc9e47e0a0d0c (patch) | |
| tree | 98f4a8f35a8a696ddcae2a20ea87db4425c8d396 /ui/shader.c | |
| parent | 46e19e149f3b129a22c440caba853188df67deab (diff) | |
opengl: add flipping vertex shader
Add vertex shader which flips the texture upside down while blitting it.
Add argument to qemu_gl_run_texture_blit() to enable flipping.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-4-kraxel@redhat.com
Diffstat (limited to 'ui/shader.c')
| -rw-r--r-- | ui/shader.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/ui/shader.c b/ui/shader.c index d36e7af232..008458bf94 100644 --- a/ui/shader.c +++ b/ui/shader.c @@ -29,10 +29,12 @@ #include "ui/shader.h" #include "shader/texture-blit-vert.h" +#include "shader/texture-blit-flip-vert.h" #include "shader/texture-blit-frag.h" struct QemuGLShader { GLint texture_blit_prog; + GLint texture_blit_flip_prog; GLint texture_blit_vao; }; @@ -68,9 +70,11 @@ static GLuint qemu_gl_init_texture_blit(GLint texture_blit_prog) return vao; } -void qemu_gl_run_texture_blit(QemuGLShader *gls) +void qemu_gl_run_texture_blit(QemuGLShader *gls, bool flip) { - glUseProgram(gls->texture_blit_prog); + glUseProgram(flip + ? gls->texture_blit_flip_prog + : gls->texture_blit_prog); glBindVertexArray(gls->texture_blit_vao); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); } @@ -150,7 +154,9 @@ QemuGLShader *qemu_gl_init_shader(void) gls->texture_blit_prog = qemu_gl_create_compile_link_program (texture_blit_vert_src, texture_blit_frag_src); - if (!gls->texture_blit_prog) { + gls->texture_blit_flip_prog = qemu_gl_create_compile_link_program + (texture_blit_flip_vert_src, texture_blit_frag_src); + if (!gls->texture_blit_prog || !gls->texture_blit_flip_prog) { exit(1); } |