From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52265) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e4Pou-0005KS-Ck for qemu-devel@nongnu.org; Tue, 17 Oct 2017 07:14:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e4Pos-0001v2-1z for qemu-devel@nongnu.org; Tue, 17 Oct 2017 07:14:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45056) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e4Por-0001uQ-PK for qemu-devel@nongnu.org; Tue, 17 Oct 2017 07:13:57 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D8D35C04AC56 for ; Tue, 17 Oct 2017 11:13:56 +0000 (UTC) From: Gerd Hoffmann Date: Tue, 17 Oct 2017 13:13:47 +0200 Message-Id: <20171017111350.8176-4-kraxel@redhat.com> In-Reply-To: <20171017111350.8176-1-kraxel@redhat.com> References: <20171017111350.8176-1-kraxel@redhat.com> Subject: [Qemu-devel] [PULL 3/6] opengl: add flipping vertex shader List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann 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 Message-id: 20171010135453.6704-4-kraxel@redhat.com --- Makefile | 4 +++- include/ui/shader.h | 2 +- ui/console-gl.c | 2 +- ui/shader.c | 12 +++++++++--- ui/shader/texture-blit-flip.vert | 10 ++++++++++ 5 files changed, 24 insertions(+), 6 deletions(-) create mode 100644 ui/shader/texture-blit-flip.vert diff --git a/Makefile b/Makefile index e124f1c5a0..0d293ad294 100644 --- a/Makefile +++ b/Makefile @@ -673,7 +673,9 @@ ui/shader/%-frag.h: $(SRC_PATH)/ui/shader/%.frag $(SRC_PATH)/scripts/shaderinclu "FRAG","$@") ui/shader.o: $(SRC_PATH)/ui/shader.c \ - ui/shader/texture-blit-vert.h ui/shader/texture-blit-frag.h + ui/shader/texture-blit-vert.h \ + ui/shader/texture-blit-flip-vert.h \ + ui/shader/texture-blit-frag.h # documentation MAKEINFO=makeinfo diff --git a/include/ui/shader.h b/include/ui/shader.h index 369e49865f..4c5acb2ce8 100644 --- a/include/ui/shader.h +++ b/include/ui/shader.h @@ -5,7 +5,7 @@ typedef struct QemuGLShader QemuGLShader; -void qemu_gl_run_texture_blit(QemuGLShader *gls); +void qemu_gl_run_texture_blit(QemuGLShader *gls, bool flip); QemuGLShader *qemu_gl_init_shader(void); void qemu_gl_fini_shader(QemuGLShader *gls); diff --git a/ui/console-gl.c b/ui/console-gl.c index 9b50daedbd..5b77e7aa88 100644 --- a/ui/console-gl.c +++ b/ui/console-gl.c @@ -109,7 +109,7 @@ void surface_gl_render_texture(QemuGLShader *gls, glClearColor(0.1f, 0.1f, 0.1f, 0.0f); glClear(GL_COLOR_BUFFER_BIT); - qemu_gl_run_texture_blit(gls); + qemu_gl_run_texture_blit(gls, false); } void surface_gl_destroy_texture(QemuGLShader *gls, 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); } diff --git a/ui/shader/texture-blit-flip.vert b/ui/shader/texture-blit-flip.vert new file mode 100644 index 0000000000..ba081fa5a6 --- /dev/null +++ b/ui/shader/texture-blit-flip.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; +} -- 2.9.3