diff options
| author | Mike Pavone <pavone@retrodev.com> | 2013-10-29 19:09:19 -0700 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2013-10-29 19:09:19 -0700 |
| commit | 4e574489c935f2ba1ddc75f77a012391e1a65210 (patch) | |
| tree | f06ed5f5bb9aeb2db8e586ae0c11121d39979b6e /render_sdl.c | |
| parent | 2f5d44553a78ac5af6045e66f2061a25103f660c (diff) | |
Preserve aspect ratio unless config file says otherwise
Diffstat (limited to 'render_sdl.c')
| -rw-r--r-- | render_sdl.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/render_sdl.c b/render_sdl.c index 709733c..70cb3e4 100644 --- a/render_sdl.c +++ b/render_sdl.c @@ -5,6 +5,7 @@ */ #include <stdlib.h> #include <stdio.h> +#include <math.h> #include "render.h" #include "blastem.h" #include "io.h" @@ -101,7 +102,7 @@ uint32_t render_map_color(uint8_t r, uint8_t g, uint8_t b) #ifndef DISABLE_OPENGL GLuint textures[3], buffers[2], vshader, fshader, program, un_textures[2], at_pos; -const GLfloat vertex_data[] = { +GLfloat vertex_data[] = { -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, @@ -259,16 +260,25 @@ void render_init(int width, int height, char * title, uint32_t fps, uint8_t full if (use_gl) { GLenum res = glewInit(); - if (res != GLEW_OK) - { + if (res != GLEW_OK) { fprintf(stderr, "Initialization of GLEW failed with code %d\n", res); exit(1); } - if (!GLEW_VERSION_2_0) - { + if (!GLEW_VERSION_2_0) { fputs("OpenGL 2.0 is unable, falling back to standard SDL rendering\n", stderr); exit(1); } + float aspect = (float)width / height; + if (fabs(aspect - 4.0/3.0) > 0.01 && strcmp(tern_find_ptr_default(config, "videoaspect", "normal"), "stretch")) { + for (int i = 0; i < 4; i++) + { + if (aspect > 4.0/3.0) { + vertex_data[i*2] *= (4.0/3.0)/aspect; + } else { + vertex_data[i*2+1] *= aspect/(4.0/3.0); + } + } + } } render_gl = use_gl; #endif |