コード例 #1
0
ファイル: OGLTextRenderer.c プロジェクト: ChenYao/jdk7u-jdk
/**
 * Initializes a 3D texture object for use as a three-dimensional gamma
 * lookup table.  Note that the wrap mode is initialized to GL_LINEAR so
 * that the table will interpolate adjacent values when the index falls
 * somewhere in between.
 */
static GLuint
OGLTR_InitGammaLutTexture()
{
    GLuint lutTextureID;

    j2d_glGenTextures(1, &lutTextureID);
    j2d_glBindTexture(GL_TEXTURE_3D, lutTextureID);
    j2d_glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    j2d_glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    j2d_glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    j2d_glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    j2d_glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

    return lutTextureID;
}
コード例 #2
0
ファイル: OGLTextRenderer.c プロジェクト: ChenYao/jdk7u-jdk
/**
 * Initializes the one glyph cache (texture and data structure).
 * If lcdCache is JNI_TRUE, the texture will contain RGB data,
 * otherwise we will simply store the grayscale/monochrome glyph images
 * as intensity values (which work well with the GL_MODULATE function).
 */
static jboolean
OGLTR_InitGlyphCache(jboolean lcdCache)
{
    GlyphCacheInfo *gcinfo;
    GLclampf priority = 1.0f;
    GLenum internalFormat = lcdCache ? GL_RGB8 : GL_INTENSITY8;
    GLenum pixelFormat = lcdCache ? GL_RGB : GL_LUMINANCE;

    J2dTraceLn(J2D_TRACE_INFO, "OGLTR_InitGlyphCache");

    // init vertex cache (if it hasn't been already)
    if (!OGLVertexCache_InitVertexCache()) {
        return JNI_FALSE;
    }

    // init glyph cache data structure
    gcinfo = AccelGlyphCache_Init(OGLTR_CACHE_WIDTH,
                                  OGLTR_CACHE_HEIGHT,
                                  OGLTR_CACHE_CELL_WIDTH,
                                  OGLTR_CACHE_CELL_HEIGHT,
                                  OGLVertexCache_FlushVertexCache);
    if (gcinfo == NULL) {
        J2dRlsTraceLn(J2D_TRACE_ERROR,
                      "OGLTR_InitGlyphCache: could not init OGL glyph cache");
        return JNI_FALSE;
    }

    // init cache texture object
    j2d_glGenTextures(1, &gcinfo->cacheID);
    j2d_glBindTexture(GL_TEXTURE_2D, gcinfo->cacheID);
    j2d_glPrioritizeTextures(1, &gcinfo->cacheID, &priority);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    j2d_glTexImage2D(GL_TEXTURE_2D, 0, internalFormat,
                     OGLTR_CACHE_WIDTH, OGLTR_CACHE_HEIGHT, 0,
                     pixelFormat, GL_UNSIGNED_BYTE, NULL);

    cacheStatus = (lcdCache ? CACHE_LCD : CACHE_GRAY);
    glyphCache = gcinfo;

    return JNI_TRUE;
}
コード例 #3
0
/**
 * Creates a 2D texture of the given format and dimensions and returns the
 * texture object identifier.  This method is typically used to create a
 * temporary texture for intermediate work, such as in the
 * OGLContext_InitBlitTileTexture() method below.
 */
GLuint
OGLContext_CreateBlitTexture(GLenum internalFormat, GLenum pixelFormat,
                             GLuint width, GLuint height)
{
    GLuint texID;
    GLint sp, sr, rl, align;
    GLclampf priority = 1.0f;

    J2dTraceLn(J2D_TRACE_INFO, "OGLContext_CreateBlitTexture");

    j2d_glGenTextures(1, &texID);
    j2d_glBindTexture(GL_TEXTURE_2D, texID);
    j2d_glPrioritizeTextures(1, &texID, &priority);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    OGLSD_RESET_TEXTURE_WRAP(GL_TEXTURE_2D);

    // save pixel store parameters (since this method could be invoked after
    // the caller has already set up its pixel store parameters)
    j2d_glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &sp);
    j2d_glGetIntegerv(GL_UNPACK_SKIP_ROWS, &sr);
    j2d_glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rl);
    j2d_glGetIntegerv(GL_UNPACK_ALIGNMENT, &align);

    // set pixel store parameters to default values
    j2d_glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
    j2d_glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
    j2d_glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    j2d_glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    j2d_glTexImage2D(GL_TEXTURE_2D, 0, internalFormat,
                     width, height, 0,
                     pixelFormat, GL_UNSIGNED_BYTE, NULL);

    // restore pixel store parameters
    j2d_glPixelStorei(GL_UNPACK_SKIP_PIXELS, sp);
    j2d_glPixelStorei(GL_UNPACK_SKIP_ROWS, sr);
    j2d_glPixelStorei(GL_UNPACK_ROW_LENGTH, rl);
    j2d_glPixelStorei(GL_UNPACK_ALIGNMENT, align);

    return texID;
}
コード例 #4
0
/**
 * Returns JNI_TRUE only if all of the following conditions are met:
 *   - the GL_EXT_framebuffer_object extension is available
 *   - FBO support has been enabled via the system property
 *   - we can successfully create an FBO with depth capabilities
 */
static jboolean
OGLContext_IsFBObjectExtensionAvailable(JNIEnv *env,
                                        const char *extString)
{
    jboolean isFBObjectEnabled = JNI_FALSE;
    GLuint fbobjectID, textureID, depthID;
    jint width = 1, height = 1;

    J2dTraceLn(J2D_TRACE_INFO, "OGLContext_IsFBObjectExtensionAvailable");

    // first see if the fbobject extension is available
    if (!OGLContext_IsExtensionAvailable(extString,
                                         "GL_EXT_framebuffer_object"))
    {
        return JNI_FALSE;
    }

    // next see if the depth texture extension is available
    if (!OGLContext_IsExtensionAvailable(extString,
                                         "GL_ARB_depth_texture"))
    {
        return JNI_FALSE;
    }

    // next see if the fbobject system property has been enabled
    isFBObjectEnabled =
        JNU_GetStaticFieldByName(env, NULL,
                                 "sun/java2d/opengl/OGLSurfaceData",
                                 "isFBObjectEnabled", "Z").z;
    if (!isFBObjectEnabled) {
        J2dRlsTraceLn(J2D_TRACE_INFO,
                      "OGLContext_IsFBObjectExtensionAvailable: disabled via flag");
        return JNI_FALSE;
    }

    // finally, create a dummy fbobject with depth capabilities to see
    // if this configuration is supported by the drivers/hardware
    // (first we initialize a color texture object that will be used to
    // construct the dummy fbobject)
    j2d_glGenTextures(1, &textureID);
    j2d_glBindTexture(GL_TEXTURE_2D, textureID);
    j2d_glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
                     width, height, 0,
                     GL_RGB, GL_UNSIGNED_BYTE, NULL);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    j2d_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    // initialize framebuffer object using color texture created above
    if (!OGLSD_InitFBObject(&fbobjectID, &depthID,
                            textureID, GL_TEXTURE_2D,
                            width, height))
    {
        J2dRlsTraceLn(J2D_TRACE_INFO,
                      "OGLContext_IsFBObjectExtensionAvailable: fbobject unsupported");
        j2d_glDeleteTextures(1, &textureID);
        return JNI_FALSE;
    }

    // delete the temporary resources
    j2d_glDeleteTextures(1, &textureID);
    j2d_glDeleteRenderbuffersEXT(1, &depthID);
    j2d_glDeleteFramebuffersEXT(1, &fbobjectID);

    J2dRlsTraceLn(J2D_TRACE_INFO,
                  "OGLContext_IsFBObjectExtensionAvailable: fbobject supported");

    return JNI_TRUE;
}