Imported Upstream version 0.13.2+dsfg1

2016-02-24 00:16:51 +01:00 · 2016-02-24 00:16:51 +01:00 · fb3990e9e5
commit fb3990e9e5
2036 changed files with 287360 additions and 0 deletions
--- a/libobs/graphics/texture-render.c
+++ b/libobs/graphics/texture-render.c
@ -0,0 +1,139 @@
+/******************************************************************************
+    Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+/*
+ *   This is a set of helper functions to more easily render to textures
+ * without having to duplicate too much code.
+ */
+
+#include <assert.h>
+#include "graphics.h"
+
+struct gs_texture_render {
+	gs_texture_t  *target, *prev_target;
+	gs_zstencil_t *zs, *prev_zs;
+
+	uint32_t cx, cy;
+
+	enum gs_color_format    format;
+	enum gs_zstencil_format zsformat;
+
+	bool rendered;
+};
+
+gs_texrender_t *gs_texrender_create(enum gs_color_format format,
+		enum gs_zstencil_format zsformat)
+{
+	struct gs_texture_render *texrender;
+	texrender = bzalloc(sizeof(struct gs_texture_render));
+	texrender->format   = format;
+	texrender->zsformat = zsformat;
+
+	return texrender;
+}
+
+void gs_texrender_destroy(gs_texrender_t *texrender)
+{
+	if (texrender) {
+		gs_texture_destroy(texrender->target);
+		gs_zstencil_destroy(texrender->zs);
+		bfree(texrender);
+	}
+}
+
+static bool texrender_resetbuffer(gs_texrender_t *texrender, uint32_t cx,
+		uint32_t cy)
+{
+	if (!texrender)
+		return false;
+
+	gs_texture_destroy(texrender->target);
+	gs_zstencil_destroy(texrender->zs);
+
+	texrender->target = NULL;
+	texrender->zs     = NULL;
+	texrender->cx     = cx;
+	texrender->cy     = cy;
+
+	texrender->target = gs_texture_create(cx, cy, texrender->format,
+			1, NULL, GS_RENDER_TARGET);
+	if (!texrender->target)
+		return false;
+
+	if (texrender->zsformat != GS_ZS_NONE) {
+		texrender->zs = gs_zstencil_create(cx, cy, texrender->zsformat);
+		if (!texrender->zs) {
+			gs_texture_destroy(texrender->target);
+			texrender->target = NULL;
+
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool gs_texrender_begin(gs_texrender_t *texrender, uint32_t cx, uint32_t cy)
+{
+	if (!texrender || texrender->rendered)
+		return false;
+
+	if (!cx || !cy)
+		return false;
+
+	if (texrender->cx != cx || texrender->cy != cy)
+		if (!texrender_resetbuffer(texrender, cx, cy))
+			return false;
+
+	gs_viewport_push();
+	gs_projection_push();
+	gs_matrix_push();
+	gs_matrix_identity();
+
+	texrender->prev_target = gs_get_render_target();
+	texrender->prev_zs     = gs_get_zstencil_target();
+	gs_set_render_target(texrender->target, texrender->zs);
+
+	gs_set_viewport(0, 0, texrender->cx, texrender->cy);
+
+	return true;
+}
+
+void gs_texrender_end(gs_texrender_t *texrender)
+{
+	if (!texrender)
+		return;
+
+	gs_set_render_target(texrender->prev_target, texrender->prev_zs);
+
+	gs_matrix_pop();
+	gs_projection_pop();
+	gs_viewport_pop();
+
+	texrender->rendered = true;
+}
+
+void gs_texrender_reset(gs_texrender_t *texrender)
+{
+	if (texrender)
+		texrender->rendered = false;
+}
+
+gs_texture_t *gs_texrender_get_texture(const gs_texrender_t *texrender)
+{
+	return texrender ? texrender->target : NULL;
+}