diff options
Diffstat (limited to 'opengl.c')
| -rw-r--r-- | opengl.c | 84 |
1 files changed, 55 insertions, 29 deletions
@@ -1442,7 +1442,7 @@ glx_render_(session_t *ps, const glx_texture_t *ptex, #endif argb = argb || (GLX_TEXTURE_FORMAT_RGBA_EXT == - ps->psglx->fbconfigs[ptex->depth]->texture_fmt); + ps->psglx->fbconfigs[ptex->depth]->texture_fmt); #ifdef CONFIG_VSYNC_OPENGL_GLSL const bool has_prog = pprogram && pprogram->prog; #endif @@ -1754,6 +1754,32 @@ glx_swap_copysubbuffermesa(session_t *ps, XserverRegion reg) { cxfree(rects); } +/** + * @brief Get tightly packed RGB888 data from GL front buffer. + * + * Don't expect any sort of decent performance. + * + * @returns tightly packed RGB888 data of the size of the screen, + * to be freed with `free()` + */ +unsigned char * +glx_take_screenshot(session_t *ps, int *out_length) { + int length = 3 * ps->root_width * ps->root_height; + GLint unpack_align_old = 0; + glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpack_align_old); + assert(unpack_align_old > 0); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + unsigned char *buf = cmalloc(length, unsigned char); + glReadBuffer(GL_FRONT); + glReadPixels(0, 0, ps->root_width, ps->root_height, GL_RGB, + GL_UNSIGNED_BYTE, buf); + glReadBuffer(GL_BACK); + glPixelStorei(GL_UNPACK_ALIGNMENT, unpack_align_old); + if (out_length) + *out_length = sizeof(unsigned char) * length; + return buf; +} + #ifdef CONFIG_VSYNC_OPENGL_GLSL GLuint glx_create_shader(GLenum shader_type, const char *shader_str) { @@ -1847,34 +1873,34 @@ glx_create_program_end: */ GLuint glx_create_program_from_str(const char *vert_shader_str, - const char *frag_shader_str) { - GLuint vert_shader = 0; - GLuint frag_shader = 0; - GLuint prog = 0; - - if (vert_shader_str) - vert_shader = glx_create_shader(GL_VERTEX_SHADER, vert_shader_str); - if (frag_shader_str) - frag_shader = glx_create_shader(GL_FRAGMENT_SHADER, frag_shader_str); - - { - GLuint shaders[2]; - int count = 0; - if (vert_shader) - shaders[count++] = vert_shader; - if (frag_shader) - shaders[count++] = frag_shader; - assert(count <= sizeof(shaders) / sizeof(shaders[0])); - if (count) - prog = glx_create_program(shaders, count); - } - - if (vert_shader) - glDeleteShader(vert_shader); - if (frag_shader) - glDeleteShader(frag_shader); - - return prog; + const char *frag_shader_str) { + GLuint vert_shader = 0; + GLuint frag_shader = 0; + GLuint prog = 0; + + if (vert_shader_str) + vert_shader = glx_create_shader(GL_VERTEX_SHADER, vert_shader_str); + if (frag_shader_str) + frag_shader = glx_create_shader(GL_FRAGMENT_SHADER, frag_shader_str); + + { + GLuint shaders[2]; + int count = 0; + if (vert_shader) + shaders[count++] = vert_shader; + if (frag_shader) + shaders[count++] = frag_shader; + assert(count <= sizeof(shaders) / sizeof(shaders[0])); + if (count) + prog = glx_create_program(shaders, count); + } + + if (vert_shader) + glDeleteShader(vert_shader); + if (frag_shader) + glDeleteShader(frag_shader); + + return prog; } #endif |