src/egl/main/eglconfigutil.c

   1 /**
   2  * Extra utility functions related to EGL configs.
   3  */
   4
   5
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include "eglconfigutil.h"
   9
  10
  11 /**
  12  * Convert an _EGLConfig to a __GLcontextModes object.
  13  * NOTE: This routine may be incomplete - we're only making sure that
  14  * the fields needed by Mesa (for _mesa_create_context/framebuffer) are
  15  * set correctly.
  16  */
  17 void
  18 _eglConfigToContextModesRec(const _EGLConfig *config, __GLcontextModes *mode)
  19 {
  20    memset(mode, 0, sizeof(*mode));
  21
  22    mode->rgbMode = GL_TRUE; /* no color index */
  23    mode->colorIndexMode = GL_FALSE;
  24    mode->doubleBufferMode = GL_TRUE;  /* always DB for now */
  25    mode->stereoMode = GL_FALSE;
  26
  27    mode->redBits = GET_CONFIG_ATTRIB(config, EGL_RED_SIZE);
  28    mode->greenBits = GET_CONFIG_ATTRIB(config, EGL_GREEN_SIZE);
  29    mode->blueBits = GET_CONFIG_ATTRIB(config, EGL_BLUE_SIZE);
  30    mode->alphaBits = GET_CONFIG_ATTRIB(config, EGL_ALPHA_SIZE);
  31    mode->rgbBits = GET_CONFIG_ATTRIB(config, EGL_BUFFER_SIZE);
  32
  33    /* no rgba masks - fix? */
  34
  35    mode->depthBits = GET_CONFIG_ATTRIB(config, EGL_DEPTH_SIZE);
  36    mode->haveDepthBuffer = mode->depthBits > 0;
  37
  38    mode->stencilBits = GET_CONFIG_ATTRIB(config, EGL_STENCIL_SIZE);
  39    mode->haveStencilBuffer = mode->stencilBits > 0;
  40
  41    /* no accum */
  42
  43    mode->level = GET_CONFIG_ATTRIB(config, EGL_LEVEL);
  44    mode->samples = GET_CONFIG_ATTRIB(config, EGL_SAMPLES);
  45    mode->sampleBuffers = GET_CONFIG_ATTRIB(config, EGL_SAMPLE_BUFFERS);
  46
  47    /* surface type - not really needed */
  48    mode->visualType = GLX_TRUE_COLOR;
  49    mode->renderType = GLX_RGBA_BIT;
  50 }
  51
  52
  53 /**
  54  * Convert a __GLcontextModes object to an _EGLConfig.
  55  */
  56 EGLBoolean
  57 _eglConfigFromContextModesRec(_EGLConfig *conf, const __GLcontextModes *m,
  58                               EGLint conformant, EGLint renderable_type)
  59 {
  60    EGLint config_caveat, surface_type;
  61
  62    /* must be RGBA */
  63    if (!m->rgbMode || !(m->renderType & GLX_RGBA_BIT))
  64       return EGL_FALSE;
  65
  66    config_caveat = EGL_NONE;
  67    if (m->visualRating == GLX_SLOW_CONFIG)
  68       config_caveat = EGL_SLOW_CONFIG;
  69
  70    if (m->visualRating == GLX_NON_CONFORMANT_CONFIG)
  71       conformant &= ~EGL_OPENGL_BIT;
  72    if (!(conformant & EGL_OPENGL_ES_BIT))
  73       config_caveat = EGL_NON_CONFORMANT_CONFIG;
  74
  75    surface_type = 0;
  76    if (m->drawableType & GLX_WINDOW_BIT)
  77       surface_type |= EGL_WINDOW_BIT;
  78    if (m->drawableType & GLX_PIXMAP_BIT)
  79       surface_type |= EGL_PIXMAP_BIT;
  80    if (m->drawableType & GLX_PBUFFER_BIT)
  81       surface_type |= EGL_PBUFFER_BIT;
  82
  83    SET_CONFIG_ATTRIB(conf, EGL_BUFFER_SIZE, m->rgbBits);
  84    SET_CONFIG_ATTRIB(conf, EGL_RED_SIZE, m->redBits);
  85    SET_CONFIG_ATTRIB(conf, EGL_GREEN_SIZE, m->greenBits);
  86    SET_CONFIG_ATTRIB(conf, EGL_BLUE_SIZE, m->blueBits);
  87    SET_CONFIG_ATTRIB(conf, EGL_ALPHA_SIZE, m->alphaBits);
  88
  89    SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGB, m->bindToTextureRgb);
  90    SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGBA, m->bindToTextureRgba);
  91    SET_CONFIG_ATTRIB(conf, EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER);
  92    SET_CONFIG_ATTRIB(conf, EGL_CONFIG_CAVEAT, config_caveat);
  93
  94    SET_CONFIG_ATTRIB(conf, EGL_CONFORMANT, conformant);
  95    SET_CONFIG_ATTRIB(conf, EGL_DEPTH_SIZE, m->depthBits);
  96    SET_CONFIG_ATTRIB(conf, EGL_LEVEL, m->level);
  97    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_WIDTH, m->maxPbufferWidth);
  98    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_HEIGHT, m->maxPbufferHeight);
  99    SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_PIXELS, m->maxPbufferPixels);
 100
 101    SET_CONFIG_ATTRIB(conf, EGL_NATIVE_RENDERABLE, m->xRenderable);
 102    SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_ID, m->visualID);
 103
 104    if (m->visualType != GLX_NONE)
 105       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE, m->visualType);
 106    else
 107       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE, EGL_NONE);
 108
 109    SET_CONFIG_ATTRIB(conf, EGL_RENDERABLE_TYPE, renderable_type);
 110    SET_CONFIG_ATTRIB(conf, EGL_SAMPLE_BUFFERS, m->sampleBuffers);
 111    SET_CONFIG_ATTRIB(conf, EGL_SAMPLES, m->samples);
 112    SET_CONFIG_ATTRIB(conf, EGL_STENCIL_SIZE, m->stencilBits);
 113
 114    SET_CONFIG_ATTRIB(conf, EGL_SURFACE_TYPE, surface_type);
 115
 116    /* what to do with GLX_TRANSPARENT_INDEX? */
 117    if (m->transparentPixel == GLX_TRANSPARENT_RGB) {
 118       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE, EGL_TRANSPARENT_RGB);
 119       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_RED_VALUE, m->transparentRed);
 120       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_GREEN_VALUE, m->transparentGreen);
 121       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_BLUE_VALUE, m->transparentBlue);
 122    }
 123    else {
 124       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE, EGL_NONE);
 125    }
 126
 127    return EGL_TRUE;
 128 }