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gltestsrc: implement the circular method
https://bugzilla.gnome.org/show_bug.cgi?id=759801
This commit is contained in:
Matthew Waters
Tim-Philipp Müller
parent
309005b12d
commit
b7ab7aa349
1 changed files with 99 additions and 83 deletions
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@ -23,12 +23,6 @@
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#include "gltestsrc.h"
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#include <math.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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struct vts_color_struct
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{
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gfloat R, G, B;
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@ -748,92 +742,113 @@ static const struct SrcFuncs src_mandelbrot = {
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_src_mandelbrot_free,
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};
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#if 0
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void
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gst_gl_test_src_circular (GstGLTestSrc * v, GstBuffer * buffer, int w, int h)
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/* *INDENT-OFF* */
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static const gchar *circular_vertex_src =
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"attribute vec4 position;\n"
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"varying vec2 uv;\n"
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"void main()\n"
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"{\n"
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" gl_Position = position;\n"
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" uv = position.xy;\n"
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"}";
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static const gchar *circular_fragment_src =
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"#ifdef GL_ES\n"
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"precision mediump float;\n"
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"#endif\n"
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"uniform float aspect_ratio;\n"
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"varying vec2 uv;\n"
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"#define PI 3.14159265\n"
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"void main() {\n"
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" float dist = 0.5 * sqrt(uv.x * uv.x + uv.y / aspect_ratio * uv.y / aspect_ratio);\n"
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" float seg = floor(dist * 16.0);\n"
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" if (seg <= 0.0 || seg >= 8.0) {\n"
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" gl_FragColor = vec4(vec3(0.0), 1.0);\n"
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" } else {\n"
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" float d = floor (256.0 * dist * 200.0 * pow (2.0, - (seg - 1.0) / 4.0) + 0.5) / 128.0;\n"
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" gl_FragColor = vec4 (vec3(sin (d * PI) * 0.5 + 0.5), 1.0);\n"
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" }\n"
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"}";
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/* *INDENT-ON* */
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static gboolean
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_src_circular_init (gpointer impl, GstGLContext * context,
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GstVideoInfo * v_info)
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{
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#if 0
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int i;
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int j;
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paintinfo pi = { NULL, };
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paintinfo *p = π
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struct fourcc_list_struct *fourcc;
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struct vts_color_struct color;
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static uint8_t sine_array[256];
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static int sine_array_inited = FALSE;
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double freq[8];
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struct SrcShader *src = impl;
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GError *error = NULL;
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#ifdef SCALE_AMPLITUDE
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double ampl[8];
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#endif
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int d;
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src->base.context = context;
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if (!sine_array_inited) {
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for (i = 0; i < 256; i++) {
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sine_array[i] =
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floor (255 * (0.5 + 0.5 * sin (i * 2 * M_PI / 256)) + 0.5);
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}
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sine_array_inited = TRUE;
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if (src->shader)
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gst_object_unref (src->shader);
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src->shader = gst_gl_shader_new_link_with_stages (context, &error,
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gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
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GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
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circular_vertex_src),
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gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
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GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
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circular_fragment_src), NULL);
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if (!src->shader) {
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GST_ERROR_OBJECT (src->base.src, "%s", error->message);
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return FALSE;
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}
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p->width = w;
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p->height = h;
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fourcc = v->fourcc;
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if (fourcc == NULL)
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src->attr_position =
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gst_gl_shader_get_attribute_location (src->shader, "position");
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if (src->attr_position == -1) {
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GST_ERROR_OBJECT (src->base.src, "No position attribute");
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return FALSE;
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}
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src->vertices = positions;
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src->n_vertices = 4;
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src->indices = indices_quad;
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src->n_indices = 6;
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gst_gl_shader_use (src->shader);
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gst_gl_shader_set_uniform_1f (src->shader, "aspect_ratio",
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(gfloat) GST_VIDEO_INFO_WIDTH (v_info) /
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(gfloat) GST_VIDEO_INFO_HEIGHT (v_info));
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gst_gl_context_clear_shader (src->base.context);
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return TRUE;
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}
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static void
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_src_circular_free (gpointer impl)
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{
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struct SrcShader *src = impl;
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if (!src)
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return;
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fourcc->paint_setup (p, dest);
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p->paint_hline = fourcc->paint_hline;
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if (src->shader)
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gst_object_unref (src->shader);
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src->shader = NULL;
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color = vts_colors[COLOR_BLACK];
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p->color = &color;
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for (i = 1; i < 8; i++) {
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freq[i] = 200 * pow (2.0, -(i - 1) / 4.0);
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#ifdef SCALE_AMPLITUDE
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{
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double x;
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x = 2 * M_PI * freq[i] / w;
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ampl[i] = sin (x) / x;
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}
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#endif
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}
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for (i = 0; i < w; i++) {
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for (j = 0; j < h; j++) {
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double dist;
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int seg;
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dist =
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sqrt ((2 * i - w) * (2 * i - w) + (2 * j - h) * (2 * j -
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h)) / (2 * w);
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seg = floor (dist * 16);
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if (seg == 0 || seg >= 8) {
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color.Y = 255;
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} else {
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#ifdef SCALE_AMPLITUDE
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double a;
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#endif
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d = floor (256 * dist * freq[seg] + 0.5);
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#ifdef SCALE_AMPLITUDE
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a = ampl[seg];
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if (a < 0)
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a = 0;
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color.Y = 128 + a * (sine_array[d & 0xff] - 128);
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#else
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color.Y = sine_array[d & 0xff];
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#endif
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}
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color.R = color.Y;
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color.G = color.Y;
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color.B = color.Y;
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p->paint_hline (p, i, j, 1);
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}
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}
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#endif
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g_free (impl);
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}
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#endif
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static gpointer
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_src_circular_new (GstGLTestSrc * test)
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{
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struct SrcShader *src = g_new0 (struct SrcShader, 1);
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src->base.src = test;
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return src;
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}
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static const struct SrcFuncs src_circular = {
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GST_GL_TEST_SRC_CIRCULAR,
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_src_circular_new,
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_src_circular_init,
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_src_mandelbrot_fill_bound_fbo,
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_src_circular_free,
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};
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static const struct SrcFuncs *src_impls[] = {
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&src_smpte,
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&src_snow,
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@ -846,6 +861,7 @@ static const struct SrcFuncs *src_impls[] = {
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&src_checkers2,
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&src_checkers4,
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&src_checkers8,
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&src_circular,
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&src_blink,
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&src_mandelbrot,
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};
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