More similar code from gl and gl2 moved to gl_common

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14079 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 161 insertions, 0 deletions

diff --git a/libvo/gl_common.c b/libvo/gl_common.c
index 7c82c74076..3526195618 100644
--- a/libvo/gl_common.c
+++ b/libvo/gl_common.c
@@ -17,6 +17,167 @@ void glAdjustAlignment(int stride) {
   glPixelStorei (GL_UNPACK_ALIGNMENT, gl_alignment);
 }
 
+#include "img_format.h"
+
+struct gl_name_map_struct {
+  GLint value;
+  char *name;
+};
+
+#undef MAP
+#define MAP(a) {a, #a}
+static const struct gl_name_map_struct gl_name_map[] = {
+  // internal format
+  MAP(GL_R3_G3_B2), MAP(GL_RGB4), MAP(GL_RGB5), MAP(GL_RGB8),
+  MAP(GL_RGB10), MAP(GL_RGB12), MAP(GL_RGB16), MAP(GL_RGBA2),
+  MAP(GL_RGBA4), MAP(GL_RGB5_A1), MAP(GL_RGBA8), MAP(GL_RGB10_A2),
+  MAP(GL_RGBA12), MAP(GL_RGBA16), MAP(GL_LUMINANCE8),
+
+  // format
+  MAP(GL_RGB), MAP(GL_RGBA), MAP(GL_RED), MAP(GL_GREEN), MAP(GL_BLUE),
+  MAP(GL_ALPHA), MAP(GL_LUMINANCE), MAP(GL_LUMINANCE_ALPHA),
+  MAP(GL_COLOR_INDEX),
+  // rest 1.2 only
+#ifdef GL_VERSION_1_2
+  MAP(GL_BGR), MAP(GL_BGRA),
+#endif
+
+  //type
+  MAP(GL_BYTE), MAP(GL_UNSIGNED_BYTE), MAP(GL_SHORT), MAP(GL_UNSIGNED_SHORT),
+  MAP(GL_INT), MAP(GL_UNSIGNED_INT), MAP(GL_FLOAT), MAP(GL_DOUBLE),
+  MAP(GL_2_BYTES), MAP(GL_3_BYTES), MAP(GL_4_BYTES),
+  // rest 1.2 only
+#ifdef GL_VERSION_1_2
+  MAP(GL_UNSIGNED_BYTE_3_3_2), MAP(GL_UNSIGNED_BYTE_2_3_3_REV),
+  MAP(GL_UNSIGNED_SHORT_5_6_5), MAP(GL_UNSIGNED_SHORT_5_6_5_REV),
+  MAP(GL_UNSIGNED_SHORT_4_4_4_4), MAP(GL_UNSIGNED_SHORT_4_4_4_4_REV),
+  MAP(GL_UNSIGNED_SHORT_5_5_5_1), MAP(GL_UNSIGNED_SHORT_1_5_5_5_REV),
+  MAP(GL_UNSIGNED_INT_8_8_8_8), MAP(GL_UNSIGNED_INT_8_8_8_8_REV),
+  MAP(GL_UNSIGNED_INT_10_10_10_2), MAP(GL_UNSIGNED_INT_2_10_10_10_REV),
+#endif
+  {0, 0}
+};
+#undef MAP
+
+/**
+ * \brief return the name of an OpenGL constant
+ * \param value the constant
+ * \return name of the constant or "Unknown format!"
+ */
+const char *glValName(GLint value)
+{
+  int i = 0;
+
+  while (gl_name_map[i].name) {
+    if (gl_name_map[i].value == value)
+      return gl_name_map[i].name;
+    i++;
+  }
+  return "Unknown format!";
+}
+
+#undef TEXTUREFORMAT_ALWAYS
+//! always return this format as internal texture format in glFindFormat
+#define TEXTUREFORMAT_ALWAYS GL_RGB8
+
+/**
+ * \brief find the OpenGL settings coresponding to format.
+ *
+ * All parameters may be NULL.
+ * \param fmt MPlayer format to analyze.
+ * \param bpp [OUT] bits per pixel of that format.
+ * \param gl_texfmt [OUT] internal texture format that fits the
+ * image format, not necessarily the best for performance.
+ * \param gl_format [OUT] OpenGL format for this image format.
+ * \param gl_type [OUT] OpenGL type for this image format.
+ * \return 1 if format is supported by OpenGL, 0 if not.
+ */
+int glFindFormat(uint32_t fmt, uint32_t *bpp, GLenum *gl_texfmt,
+                  GLenum *gl_format, GLenum *gl_type)
+{
+  int dummy1;
+  GLenum dummy2;
+  if (bpp == NULL) bpp = &dummy1;
+  if (gl_texfmt == NULL) gl_texfmt = &dummy2;
+  if (gl_format == NULL) gl_format = &dummy2;
+  if (gl_type == NULL) gl_type = &dummy2;
+  
+  *bpp = IMGFMT_IS_BGR(fmt)?IMGFMT_BGR_DEPTH(fmt):IMGFMT_RGB_DEPTH(fmt);
+  *gl_texfmt = 3;
+  switch (fmt) {
+    case IMGFMT_RGB24:
+      *gl_format = GL_RGB;
+      *gl_type = GL_UNSIGNED_BYTE;
+      break;
+    case IMGFMT_RGBA:
+      *gl_texfmt = 4;
+      *gl_format = GL_RGBA;
+      *gl_type = GL_UNSIGNED_BYTE;
+      break;
+    case IMGFMT_Y800:
+    case IMGFMT_Y8:
+      *gl_texfmt = 1;
+      *bpp = 8;
+      *gl_format = GL_LUMINANCE;
+      *gl_type = GL_UNSIGNED_BYTE;
+      break;
+#ifdef GL_VERSION_1_2
+#if 0
+    // we do not support palettized formats, although the format the
+    // swscale produces works
+    case IMGFMT_RGB8:
+      gl_format = GL_RGB;
+      gl_type = GL_UNSIGNED_BYTE_2_3_3_REV;
+      break;
+#endif
+    case IMGFMT_RGB15:
+      *gl_format = GL_RGBA;
+      *gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+      break;
+    case IMGFMT_RGB16:
+      *gl_format = GL_RGB;
+      *gl_type = GL_UNSIGNED_SHORT_5_6_5_REV;
+      break;
+#if 0
+    case IMGFMT_BGR8:
+      // special case as red and blue have a differen number of bits.
+      // GL_BGR and GL_UNSIGNED_BYTE_3_3_2 isn't supported at least
+      // by nVidia drivers, and in addition would give more bits to
+      // blue than to red, which isn't wanted
+      gl_format = GL_RGB;
+      gl_type = GL_UNSIGNED_BYTE_3_3_2;
+      break;
+#endif
+    case IMGFMT_BGR15:
+      *gl_format = GL_BGRA;
+      *gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+      break;
+    case IMGFMT_BGR16:
+      *gl_format = GL_RGB;
+      *gl_type = GL_UNSIGNED_SHORT_5_6_5;
+      break;
+    case IMGFMT_BGR24:
+      *gl_format = GL_BGR;
+      *gl_type = GL_UNSIGNED_BYTE;
+      break;
+    case IMGFMT_BGRA:
+      *gl_texfmt = 4;
+      *gl_format = GL_BGRA;
+      *gl_type = GL_UNSIGNED_BYTE;
+      break;
+#endif
+    default:
+      *gl_texfmt = 4;
+      *gl_format = GL_RGBA;
+      *gl_type = GL_UNSIGNED_BYTE;
+      return 0;
+  }
+#ifdef TEXTUREFORMAT_ALWAYS
+  *gl_texfmt = TEXTUREFORMAT_ALWAYS;
+#endif
+  return 1;
+}
+
 #ifndef GL_WIN32
 /**
  * Returns the XVisualInfo associated with Window win.