From 189eac273ba14c8ca0d22b31182b030ccc4c7756 Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Sat, 25 Dec 2021 22:01:57 -0800 Subject: *: introduce a projection matrix and winmodes The bulk of this is mechanical wiring up of a projection_x to all the nodes. But this also introduces maintenance of the projection_x, with aspect-ratio preservation in two of the modes: WINDOWED and FULLSCREEN, with the previously default stretched-to-fill fullscreen mode now relegated to a third FILLSCREEN winmode. The default at startup is now an aspect ratio-preserving windowed mode. Simply press the 'f' key at any time to cycle through them. This was mostly done in sars to provide a source-available test for reproducing a fullscreen SDL2 bug I filed @ https://github.com/libsdl-org/SDL/issues/5139 Otherwise it's pretty silly to bother with doing anything on sars... but it is a handy little mule for such things. --- src/plasma-node.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'src/plasma-node.c') diff --git a/src/plasma-node.c b/src/plasma-node.c index 1bc0e40..1eb4c7a 100644 --- a/src/plasma-node.c +++ b/src/plasma-node.c @@ -22,19 +22,21 @@ #include "glad.h" #include "plasma-node.h" #include "shader-node.h" +#include "m4f.h" static const char *plasma_vs = "" "#version 120\n" + "uniform mat4 projection_x;" + "attribute vec3 vertex;" "attribute vec2 texcoord;" "void main()" "{" " gl_TexCoord[0].xy = texcoord;" - //" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;" - " gl_Position = vec4(vertex, 1.f);" + " gl_Position = projection_x * vec4(vertex, 1.f);" "}" ""; @@ -78,16 +80,18 @@ static void plasma_uniforms(void *uniforms_ctxt, void *render_ctxt, unsigned n_u glUniform1f(uniforms[0], alpha); glUniform1f(uniforms[1], play_ticks(play, PLAY_TICKS_TIMER0) * .001f); // FIXME KLUDGE ALERT + glUniformMatrix4fv(uniforms[2], 1, GL_FALSE, &model_x->m[0][0]); } /* create plasma rendering stage */ -stage_t * plasma_node_new(const stage_conf_t *conf) +stage_t * plasma_node_new(const stage_conf_t *conf, m4f_t *projection_x) { - return shader_node_new_src(conf, plasma_vs, plasma_fs, NULL, plasma_uniforms, NULL, 2, + return shader_node_new_src(conf, plasma_vs, plasma_fs, projection_x, plasma_uniforms, NULL, 3, (const char *[]){ "alpha", "time", + "projection_x", } ); } -- cgit v1.2.3