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[166/906] add rgb_to_luma_fragment source and correspondent effect. use the latter for a cross processing effect.
This commit is contained in:
Filippo Argiolas
Matthew Waters
parent
e009d7b400
commit
5b1f62a079
7 changed files with 158 additions and 0 deletions
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@ -35,6 +35,7 @@ libgstopengl_la_SOURCES = \
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effects/gstgleffectsqueeze.c \
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effects/gstgleffectstretch.c \
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effects/gstgleffectlumatocurve.c \
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effects/gstgleffectrgbtocurve.c \
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effects/gstgleffectglow.c
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91
gst/gl/effects/gstgleffectrgbtocurve.c
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91
gst/gl/effects/gstgleffectrgbtocurve.c
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@ -0,0 +1,91 @@
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/*
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* GStreamer
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gstgleffects.h>
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#include <gstgleffectscurves.h>
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static void gst_gl_effects_rgb_to_curve (GstGLEffects *effects,
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GstGLEffectsCurve curve,
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gint curve_index,
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gint width, gint height,
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GLuint texture)
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{
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GstGLShader *shader;
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shader = g_hash_table_lookup (effects->shaderstable, "lumamap0");
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if (!shader) {
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shader = gst_gl_shader_new ();
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g_hash_table_insert (effects->shaderstable, "lumamap0", shader);
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}
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g_return_if_fail (
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gst_gl_shader_compile_and_check (shader, rgb_to_curve_fragment_source,
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GST_GL_SHADER_FRAGMENT_SOURCE));
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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gst_gl_shader_use (shader);
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if (effects->curve[curve_index] == 0) {
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/* this parameters are needed to have a right, predictable, mapping */
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glGenTextures(1, &effects->curve[curve_index]);
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glEnable(GL_TEXTURE_1D);
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glBindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexImage1D(GL_TEXTURE_1D, 0, curve.bytes_per_pixel,
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curve.width, 0,
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GL_RGB, GL_UNSIGNED_BYTE,
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curve.pixel_data);
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glDisable(GL_TEXTURE_1D);
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}
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glActiveTexture (GL_TEXTURE5);
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glEnable (GL_TEXTURE_1D);
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glBindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
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gst_gl_shader_set_uniform_1i (shader, "curve", 5);
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glDisable (GL_TEXTURE_1D);
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gst_gl_effects_draw_texture (effects, texture);
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}
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static void gst_gl_effects_xpro_callback (gint width, gint height, guint texture, gpointer data)
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{
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GstGLEffects* effects = GST_GL_EFFECTS (data);
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gst_gl_effects_rgb_to_curve (effects, xpro_curve, GST_GL_EFFECTS_CURVE_XPRO,
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width, height, texture);
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}
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void
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gst_gl_effects_xpro (GstGLEffects *effects) {
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GstGLFilter *filter = GST_GL_FILTER (effects);
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gst_gl_filter_render_to_target (filter, effects->intexture, effects->outtexture,
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gst_gl_effects_xpro_callback, effects);
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}
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@ -31,6 +31,45 @@ struct _GstGLEffectsCurve {
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typedef struct _GstGLEffectsCurve GstGLEffectsCurve;
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/* GIMP RGB C-Source image dump (xpro.c) */
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static const GstGLEffectsCurve xpro_curve = {
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256, 1, 3,
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"\0\0)\0\0)\0\2*\1\2*\1\2-\1\5-\2\6.\2\6.\2\7/\4\11""1\4\12""1\4\12""1\5\13"
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"""3\5\14""4\5\16""5\6\17""5\6\20""6\6\20""9\6\21""9\7\23:\11\24;\11\25;\11"
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"\26<\11\31<\12\31?\12\32@\13\32@\13\33@\14\35A\14\36B\14\37B\14\40D\16\""
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"E\17$F\17%F\17&G\20&H\20(J\21)K\21*K\23*M\23+M\24-N\24.N\25""1O\25""1Q\26"
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"""4R\30""4R\30""5S\31""8T\31""8T\32""9V\33;V\33;X\35<X\36>Y\36?Z\37A[\40"
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"B[\"D\\#E]#G_$G_%J`&Ka(La(Ob*Oc*Qd+Rd-Te.Ug/Vh0Yh1Zi3[j4]k5_k6am9bm;dn;h"
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"n<ho?jq?mrAmrBnsDqtFstJuuKvvKxwMzwO|xQ\177yS\200zU\204zX\204{Z\206|\\\210"
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"~_\212~a\216\177c\216\200e\217\201h\221\201j\225\202m\225\203o\227\204r\231"
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"\204u\233\205w\235\206y\237\207|\240\207\177\242\211\201\244\211\204\246"
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"\211\206\250\212\211\252\213\213\253\214\216\254\214\220\256\215\223\260"
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"\216\225\262\217\230\264\217\232\265\220\235\267\221\237\271\222\241\273"
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"\222\243\273\223\246\275\224\250\277\225\253\301\225\254\302\226\256\303"
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"\227\261\305\230\263\306\230\265\310\231\267\311\232\271\313\233\273\314"
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"\233\275\315\234\277\317\235\301\320\236\302\321\236\304\323\237\306\324"
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"\237\307\325\237\311\326\240\313\327\241\313\331\241\316\331\242\320\333"
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"\243\321\334\244\322\335\245\324\335\245\325\337\246\327\340\247\330\341"
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"\250\331\341\250\333\342\251\335\343\252\335\343\253\335\345\253\341\345"
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"\253\341\346\254\341\347\255\344\350\255\345\350\256\347\350\257\350\351"
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"\260\350\352\260\352\353\261\353\354\262\354\354\262\355\354\263\356\355"
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"\264\357\356\264\360\356\264\361\357\265\362\357\266\362\357\267\364\360"
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"\267\365\361\270\366\361\271\366\361\271\367\362\272\367\363\272\370\363"
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"\273\371\363\274\372\363\274\372\364\275\372\365\276\373\365\277\373\365"
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"\277\374\366\300\374\366\300\375\366\301\375\366\301\375\367\302\376\367"
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"\303\376\367\303\376\370\304\377\370\305\377\371\305\377\371\306\377\371"
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"\306\377\372\307\377\372\310\377\372\310\377\372\311\377\372\312\377\372"
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"\313\377\372\313\377\373\313\377\373\314\377\373\315\377\373\315\377\373"
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"\316\377\374\317\377\374\317\377\374\320\377\374\320\377\374\321\377\375"
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"\322\377\375\322\377\375\323\377\375\323\377\375\325\377\375\325\377\375"
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"\325\377\375\325\377\375\326\377\375\327\377\375\330\377\375\331\377\375"
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"\331\377\375\331\377\376\332\377\376\332\377\376\333\377\376\334\377\376"
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"\335\377\376\335\377\376\335\377\376\335\377\376\337\377\376\340\377\376"
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"\340\377\376\341\377\376\341\377\377\341\377\377\342\377\377\343\377\377"
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"\344\377\377\345\377\377\345",
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};
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/* CURVE for the cross processing effect */
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static const GstGLEffectsCurve cross_curve = {
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256, 1, 3,
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@ -144,6 +144,7 @@ const gchar *sum_fragment_source =
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" gl_FragColor = alpha * basecolor + beta * blendcolor;"
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"}";
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/* lut operations, map luma to tex1d, see orange book (chapter 19) */
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const gchar *luma_to_curve_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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@ -156,3 +157,21 @@ const gchar *luma_to_curve_fragment_source =
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" color = texture1D(curve, luma);"
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" gl_FragColor = color;"
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"}";
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/* lut operations, map rgb to tex1d, see orange book (chapter 19) */
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const gchar *rgb_to_curve_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform sampler1D curve;"
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"void main () {"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" vec4 outcolor;"
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" outcolor.r = texture1D(curve, color.r).r;"
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" outcolor.g = texture1D(curve, color.g).g;"
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" outcolor.b = texture1D(curve, color.b).b;"
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" outcolor.a = color.a;"
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" gl_FragColor = outcolor;"
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"}";
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@ -31,5 +31,6 @@ const gchar *hconv9_fragment_source;
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const gchar *vconv9_fragment_source;
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const gchar *sum_fragment_source;
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const gchar *luma_to_curve_fragment_source;
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const gchar *rgb_to_curve_fragment_source;
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#endif /* __GST_GL_EFFECTS_SOURCES_H__ */
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@ -61,6 +61,7 @@ typedef enum {
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GST_GL_EFFECT_STRETCH,
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GST_GL_EFFECT_HEAT,
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GST_GL_EFFECT_SEPIA,
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GST_GL_EFFECT_XPRO,
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GST_GL_EFFECT_GLOW,
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GST_GL_N_EFFECTS
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} GstGLEffectsEffect;
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@ -77,6 +78,7 @@ gst_gl_effects_effect_get_type (void)
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{ GST_GL_EFFECT_STRETCH, "Stretch Effect", "stretch" },
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{ GST_GL_EFFECT_HEAT, "Heat Signature Effect", "heat" },
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{ GST_GL_EFFECT_SEPIA, "Sepia Toning Effect", "sepia" },
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{ GST_GL_EFFECT_XPRO, "Cross Processing Effect", "xpro" },
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{ GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow" },
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{ 0, NULL, NULL }
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};
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@ -110,6 +112,9 @@ gst_gl_effects_set_effect (GstGLEffects *effects, gint effect_type) {
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case GST_GL_EFFECT_SEPIA:
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effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sepia;
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break;
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case GST_GL_EFFECT_XPRO:
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effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_xpro;
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break;
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case GST_GL_EFFECT_GLOW:
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effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_glow;
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break;
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@ -48,6 +48,7 @@ typedef void (* GstGLEffectProcessFunc) (GstGLEffects *effects);
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enum {
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GST_GL_EFFECTS_CURVE_HEAT,
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GST_GL_EFFECTS_CURVE_SEPIA,
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GST_GL_EFFECTS_CURVE_XPRO,
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GST_GL_EFFECTS_N_CURVES
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};
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@ -89,6 +90,7 @@ void gst_gl_effects_squeeze (GstGLEffects *effects);
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void gst_gl_effects_stretch (GstGLEffects *effects);
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void gst_gl_effects_heat (GstGLEffects *effects);
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void gst_gl_effects_sepia (GstGLEffects *effects);
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void gst_gl_effects_xpro (GstGLEffects *effects);
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void gst_gl_effects_glow (GstGLEffects *effects);
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G_END_DECLS
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