diff options
Diffstat (limited to 'qemu/ui/shader.c')
| -rw-r--r-- | qemu/ui/shader.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/qemu/ui/shader.c b/qemu/ui/shader.c index 52a463293..9264009b8 100644 --- a/qemu/ui/shader.c +++ b/qemu/ui/shader.c @@ -24,26 +24,48 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ +#include "qemu/osdep.h" #include "qemu-common.h" #include "ui/shader.h" /* ---------------------------------------------------------------------- */ -void qemu_gl_run_texture_blit(GLint texture_blit_prog) +GLuint qemu_gl_init_texture_blit(GLint texture_blit_prog) { - GLfloat in_position[] = { + static const GLfloat in_position[] = { -1, -1, 1, -1, -1, 1, 1, 1, }; GLint l_position; + GLuint vao, buffer; + + glGenVertexArrays(1, &vao); + glBindVertexArray(vao); + + /* this is the VBO that holds the vertex data */ + glGenBuffers(1, &buffer); + glBindBuffer(GL_ARRAY_BUFFER, buffer); + glBufferData(GL_ARRAY_BUFFER, sizeof(in_position), in_position, + GL_STATIC_DRAW); - glUseProgram(texture_blit_prog); l_position = glGetAttribLocation(texture_blit_prog, "in_position"); - glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, in_position); + glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, 0); glEnableVertexAttribArray(l_position); - glDrawArrays(GL_TRIANGLE_STRIP, l_position, 4); + + glBindBuffer(GL_ARRAY_BUFFER, 0); + glBindVertexArray(0); + + return vao; +} + +void qemu_gl_run_texture_blit(GLint texture_blit_prog, + GLint texture_blit_vao) +{ + glUseProgram(texture_blit_prog); + glBindVertexArray(texture_blit_vao); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); } /* ---------------------------------------------------------------------- */ |