mirror of https://github.com/mpv-player/mpv
346 lines
9.3 KiB
C
346 lines
9.3 KiB
C
#include "gl_common.h"
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/**
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* \brief adjusts the GL_UNPACK_ALGNMENT to fit the stride.
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* \param stride number of bytes per line for which alignment should fit.
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*/
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void glAdjustAlignment(int stride) {
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GLint gl_alignment;
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if (stride % 8 == 0)
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gl_alignment=8;
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else if (stride % 4 == 0)
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gl_alignment=4;
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else if (stride % 2 == 0)
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gl_alignment=2;
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else
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gl_alignment=1;
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glPixelStorei (GL_UNPACK_ALIGNMENT, gl_alignment);
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}
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#include "img_format.h"
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struct gl_name_map_struct {
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GLint value;
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char *name;
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};
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#undef MAP
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#define MAP(a) {a, #a}
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static const struct gl_name_map_struct gl_name_map[] = {
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// internal format
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MAP(GL_R3_G3_B2), MAP(GL_RGB4), MAP(GL_RGB5), MAP(GL_RGB8),
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MAP(GL_RGB10), MAP(GL_RGB12), MAP(GL_RGB16), MAP(GL_RGBA2),
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MAP(GL_RGBA4), MAP(GL_RGB5_A1), MAP(GL_RGBA8), MAP(GL_RGB10_A2),
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MAP(GL_RGBA12), MAP(GL_RGBA16), MAP(GL_LUMINANCE8),
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// format
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MAP(GL_RGB), MAP(GL_RGBA), MAP(GL_RED), MAP(GL_GREEN), MAP(GL_BLUE),
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MAP(GL_ALPHA), MAP(GL_LUMINANCE), MAP(GL_LUMINANCE_ALPHA),
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MAP(GL_COLOR_INDEX),
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// rest 1.2 only
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#ifdef GL_VERSION_1_2
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MAP(GL_BGR), MAP(GL_BGRA),
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#endif
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//type
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MAP(GL_BYTE), MAP(GL_UNSIGNED_BYTE), MAP(GL_SHORT), MAP(GL_UNSIGNED_SHORT),
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MAP(GL_INT), MAP(GL_UNSIGNED_INT), MAP(GL_FLOAT), MAP(GL_DOUBLE),
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MAP(GL_2_BYTES), MAP(GL_3_BYTES), MAP(GL_4_BYTES),
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// rest 1.2 only
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#ifdef GL_VERSION_1_2
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MAP(GL_UNSIGNED_BYTE_3_3_2), MAP(GL_UNSIGNED_BYTE_2_3_3_REV),
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MAP(GL_UNSIGNED_SHORT_5_6_5), MAP(GL_UNSIGNED_SHORT_5_6_5_REV),
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MAP(GL_UNSIGNED_SHORT_4_4_4_4), MAP(GL_UNSIGNED_SHORT_4_4_4_4_REV),
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MAP(GL_UNSIGNED_SHORT_5_5_5_1), MAP(GL_UNSIGNED_SHORT_1_5_5_5_REV),
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MAP(GL_UNSIGNED_INT_8_8_8_8), MAP(GL_UNSIGNED_INT_8_8_8_8_REV),
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MAP(GL_UNSIGNED_INT_10_10_10_2), MAP(GL_UNSIGNED_INT_2_10_10_10_REV),
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#endif
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{0, 0}
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};
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#undef MAP
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/**
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* \brief return the name of an OpenGL constant
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* \param value the constant
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* \return name of the constant or "Unknown format!"
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*/
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const char *glValName(GLint value)
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{
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int i = 0;
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while (gl_name_map[i].name) {
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if (gl_name_map[i].value == value)
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return gl_name_map[i].name;
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i++;
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}
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return "Unknown format!";
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}
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#undef TEXTUREFORMAT_ALWAYS
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//! always return this format as internal texture format in glFindFormat
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#define TEXTUREFORMAT_ALWAYS GL_RGB8
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/**
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* \brief find the OpenGL settings coresponding to format.
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*
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* All parameters may be NULL.
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* \param fmt MPlayer format to analyze.
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* \param bpp [OUT] bits per pixel of that format.
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* \param gl_texfmt [OUT] internal texture format that fits the
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* image format, not necessarily the best for performance.
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* \param gl_format [OUT] OpenGL format for this image format.
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* \param gl_type [OUT] OpenGL type for this image format.
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* \return 1 if format is supported by OpenGL, 0 if not.
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*/
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int glFindFormat(uint32_t fmt, uint32_t *bpp, GLenum *gl_texfmt,
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GLenum *gl_format, GLenum *gl_type)
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{
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int dummy1;
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GLenum dummy2;
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if (bpp == NULL) bpp = &dummy1;
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if (gl_texfmt == NULL) gl_texfmt = &dummy2;
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if (gl_format == NULL) gl_format = &dummy2;
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if (gl_type == NULL) gl_type = &dummy2;
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*bpp = IMGFMT_IS_BGR(fmt)?IMGFMT_BGR_DEPTH(fmt):IMGFMT_RGB_DEPTH(fmt);
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*gl_texfmt = 3;
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switch (fmt) {
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case IMGFMT_RGB24:
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*gl_format = GL_RGB;
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*gl_type = GL_UNSIGNED_BYTE;
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break;
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case IMGFMT_RGBA:
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*gl_texfmt = 4;
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*gl_format = GL_RGBA;
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*gl_type = GL_UNSIGNED_BYTE;
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break;
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case IMGFMT_Y800:
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case IMGFMT_Y8:
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*gl_texfmt = 1;
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*bpp = 8;
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*gl_format = GL_LUMINANCE;
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*gl_type = GL_UNSIGNED_BYTE;
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break;
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#ifdef GL_VERSION_1_2
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#if 0
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// we do not support palettized formats, although the format the
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// swscale produces works
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case IMGFMT_RGB8:
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gl_format = GL_RGB;
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gl_type = GL_UNSIGNED_BYTE_2_3_3_REV;
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break;
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#endif
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case IMGFMT_RGB15:
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*gl_format = GL_RGBA;
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*gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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break;
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case IMGFMT_RGB16:
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*gl_format = GL_RGB;
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*gl_type = GL_UNSIGNED_SHORT_5_6_5_REV;
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break;
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#if 0
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case IMGFMT_BGR8:
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// special case as red and blue have a differen number of bits.
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// GL_BGR and GL_UNSIGNED_BYTE_3_3_2 isn't supported at least
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// by nVidia drivers, and in addition would give more bits to
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// blue than to red, which isn't wanted
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gl_format = GL_RGB;
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gl_type = GL_UNSIGNED_BYTE_3_3_2;
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break;
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#endif
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case IMGFMT_BGR15:
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*gl_format = GL_BGRA;
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*gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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break;
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case IMGFMT_BGR16:
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*gl_format = GL_RGB;
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*gl_type = GL_UNSIGNED_SHORT_5_6_5;
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break;
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case IMGFMT_BGR24:
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*gl_format = GL_BGR;
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*gl_type = GL_UNSIGNED_BYTE;
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break;
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case IMGFMT_BGRA:
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*gl_texfmt = 4;
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*gl_format = GL_BGRA;
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*gl_type = GL_UNSIGNED_BYTE;
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break;
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#endif
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default:
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*gl_texfmt = 4;
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*gl_format = GL_RGBA;
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*gl_type = GL_UNSIGNED_BYTE;
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return 0;
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}
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#ifdef TEXTUREFORMAT_ALWAYS
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*gl_texfmt = TEXTUREFORMAT_ALWAYS;
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#endif
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return 1;
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}
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#ifdef GL_WIN32
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int setGlWindow(int *vinfo, HGLRC *context, HWND win)
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{
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int new_vinfo;
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HDC windc = GetDC(win);
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HGLRC new_context = 0;
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int keep_context = 0;
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// should only be needed when keeping context, but not doing glFinish
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// can cause flickering even when we do not keep it.
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glFinish();
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new_vinfo = GetPixelFormat(windc);
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if (*context && *vinfo && new_vinfo && *vinfo == new_vinfo) {
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// we can keep the wglContext
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new_context = *context;
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keep_context = 1;
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} else {
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// create a context
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new_context = wglCreateContext(windc);
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if (!new_context) {
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mp_msg(MSGT_VO, MSGL_FATAL, "[gl] Could not create GL context!\n");
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return SET_WINDOW_FAILED;
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}
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}
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// set context
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if (!wglMakeCurrent(windc, new_context)) {
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mp_msg (MSGT_VO, MSGL_FATAL, "[gl] Could not set GL context!\n");
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if (!keep_context) {
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wglDeleteContext(new_context);
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}
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return SET_WINDOW_FAILED;
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}
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// set new values
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vo_window = win;
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vo_hdc = windc;
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{
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RECT rect;
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GetClientRect(win, &rect);
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vo_dwidth = rect.right;
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vo_dheight = rect.bottom;
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}
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if (!keep_context) {
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if (*context)
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wglDeleteContext(*context);
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*context = new_context;
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*vinfo = new_vinfo;
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// and inform that reinit is neccessary
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return SET_WINDOW_REINIT;
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}
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return SET_WINDOW_OK;
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}
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void releaseGlContext(int *vinfo, HGLRC *context) {
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*vinfo = 0;
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if (*context) {
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wglMakeCurrent(0, 0);
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wglDeleteContext(*context);
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}
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*context = 0;
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}
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#else
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/**
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* \brief Returns the XVisualInfo associated with Window win.
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* \param win Window whose XVisualInfo is returne.
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* \return XVisualInfo of the window. Caller must use XFree to free it.
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*/
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static XVisualInfo *getWindowVisualInfo(Window win) {
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XWindowAttributes xw_attr;
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XVisualInfo vinfo_template;
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int tmp;
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XGetWindowAttributes(mDisplay, win, &xw_attr);
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vinfo_template.visualid = XVisualIDFromVisual(xw_attr.visual);
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return XGetVisualInfo(mDisplay, VisualIDMask, &vinfo_template, &tmp);
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}
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/**
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* \brief Changes the window in which video is displayed.
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* If possible only transfers the context to the new window, otherwise
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* creates a new one, which must be initialized by the caller.
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* \param vinfo Currently used visual.
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* \param context Currently used context.
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* \param win window that should be used for drawing.
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* \return one of SET_WINDOW_FAILED, SET_WINDOW_OK or SET_WINDOW_REINIT.
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* In case of SET_WINDOW_REINIT the context could not be transfered
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* and the caller must initialize it correctly.
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*/
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int setGlWindow(XVisualInfo **vinfo, GLXContext *context, Window win)
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{
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XVisualInfo *new_vinfo;
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GLXContext new_context = NULL;
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int keep_context = 0;
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// should only be needed when keeping context, but not doing glFinish
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// can cause flickering even when we do not keep it.
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glFinish();
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new_vinfo = getWindowVisualInfo(win);
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if (*context && *vinfo && new_vinfo &&
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(*vinfo)->visualid == new_vinfo->visualid) {
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// we can keep the GLXContext
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new_context = *context;
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XFree(new_vinfo);
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new_vinfo = *vinfo;
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keep_context = 1;
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} else {
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// create a context
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new_context = glXCreateContext(mDisplay, new_vinfo, NULL, True);
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if (!new_context) {
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mp_msg(MSGT_VO, MSGL_FATAL, "[gl] Could not create GLX context!\n");
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XFree(new_vinfo);
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return SET_WINDOW_FAILED;
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}
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}
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// set context
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if (!glXMakeCurrent(mDisplay, vo_window, new_context)) {
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mp_msg (MSGT_VO, MSGL_FATAL, "[gl] Could not set GLX context!\n");
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if (!keep_context) {
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glXDestroyContext (mDisplay, new_context);
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XFree(new_vinfo);
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}
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return SET_WINDOW_FAILED;
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}
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// set new values
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vo_window = win;
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{
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Window root;
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int tmp;
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XGetGeometry(mDisplay, vo_window, &root, &tmp, &tmp,
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&vo_dwidth, &vo_dheight, &tmp, &tmp);
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}
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if (!keep_context) {
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if (*context)
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glXDestroyContext(mDisplay, *context);
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*context = new_context;
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if (*vinfo)
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XFree(*vinfo);
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*vinfo = new_vinfo;
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// and inform that reinit is neccessary
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return SET_WINDOW_REINIT;
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}
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return SET_WINDOW_OK;
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}
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/**
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* \brief free the VisualInfo and GLXContext of an OpenGL context.
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*/
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void releaseGlContext(XVisualInfo **vinfo, GLXContext *context) {
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if (*vinfo)
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XFree(*vinfo);
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*vinfo = NULL;
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if (*context)
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{
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glFinish();
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glXMakeCurrent(mDisplay, None, NULL);
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glXDestroyContext(mDisplay, *context);
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}
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*context = 0;
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}
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#endif
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