-
-
-#if _HAVE_FULL_GL
-
-/**
- * GL_MESA_resize_buffers extension.
- *
- * When this function is called, we'll ask the window system how large
- * the current window is. If it's a new size, we'll call the driver's
- * ResizeBuffers function. The driver will then resize its color buffers
- * as needed, and maybe call the swrast's routine for reallocating
- * swrast-managed depth/stencil/accum/etc buffers.
- * \note This function should only be called through the GL API, not
- * from device drivers (as was done in the past).
- */
-void GLAPIENTRY
-_mesa_ResizeBuffersMESA( void )
-{
- GET_CURRENT_CONTEXT(ctx);
-
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glResizeBuffersMESA\n");
-
- if (ctx->WinSysDrawBuffer) {
- GLuint newWidth, newHeight;
- GLframebuffer *buffer = ctx->WinSysDrawBuffer;
-
- assert(buffer->Name == 0);
-
- /* ask device driver for size of output buffer */
- ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
-
- /* see if size of device driver's color buffer (window) has changed */
- if (buffer->Width != newWidth || buffer->Height != newHeight) {
- if (ctx->Driver.ResizeBuffers)
- ctx->Driver.ResizeBuffers(ctx, buffer, newWidth, newHeight );
- }
- }
-
- if (ctx->WinSysReadBuffer
- && ctx->WinSysReadBuffer != ctx->WinSysDrawBuffer) {
- GLuint newWidth, newHeight;
- GLframebuffer *buffer = ctx->WinSysReadBuffer;
-
- assert(buffer->Name == 0);
-
- /* ask device driver for size of read buffer */
- ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
-
- /* see if size of device driver's color buffer (window) has changed */
- if (buffer->Width != newWidth || buffer->Height != newHeight) {
- if (ctx->Driver.ResizeBuffers)
- ctx->Driver.ResizeBuffers(ctx, buffer, newWidth, newHeight );
- }
- }
-
- ctx->NewState |= _NEW_BUFFERS; /* to update scissor / window bounds */
-}
-
-
-/*
- * XXX move somewhere else someday?
- */
-void GLAPIENTRY
-_mesa_SampleCoverageARB(GLclampf value, GLboolean invert)
-{
- GET_CURRENT_CONTEXT(ctx);
-
- if (!ctx->Extensions.ARB_multisample) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glSampleCoverageARB");
- return;
- }
-
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
- ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
- ctx->Multisample.SampleCoverageInvert = invert;
- ctx->NewState |= _NEW_MULTISAMPLE;
-}
-
-#endif /* _HAVE_FULL_GL */
-
-
-
-/**
- * Define the scissor box.
- *
- * \param x, y coordinates of the scissor box lower-left corner.
- * \param width width of the scissor box.
- * \param height height of the scissor box.
- *
- * \sa glScissor().
- *
- * Verifies the parameters and updates __GLcontextRec::Scissor. On a
- * change flushes the vertices and notifies the driver via
- * the dd_function_table::Scissor callback.
- */
-void _mesa_set_scissor( GLcontext *ctx,
- GLint x, GLint y, GLsizei width, GLsizei height )
-{
- if (x == ctx->Scissor.X &&
- y == ctx->Scissor.Y &&
- width == ctx->Scissor.Width &&
- height == ctx->Scissor.Height)
- return;
-
- FLUSH_VERTICES(ctx, _NEW_SCISSOR);
- ctx->Scissor.X = x;
- ctx->Scissor.Y = y;
- ctx->Scissor.Width = width;
- ctx->Scissor.Height = height;
-
- if (ctx->Driver.Scissor)
- ctx->Driver.Scissor( ctx, x, y, width, height );
-}
-
-
-void GLAPIENTRY
-_mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (width < 0 || height < 0) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glScissor" );
- return;
- }
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glScissor %d %d %d %d\n", x, y, width, height);
-
- _mesa_set_scissor(ctx, x, y, width, height);
-}
-
-
-
-/**********************************************************************/
-/** \name Initialization */
-/*@{*/
-
-/**
- * Initialize the context's scissor state.
- * \param ctx the GL context.
- */
-void
-_mesa_init_scissor(GLcontext *ctx)
-{
- /* Scissor group */
- ctx->Scissor.Enabled = GL_FALSE;
- ctx->Scissor.X = 0;
- ctx->Scissor.Y = 0;
- ctx->Scissor.Width = 0;
- ctx->Scissor.Height = 0;
-}
-
-
-/**
- * Initialize the context's multisample state.
- * \param ctx the GL context.
- */
-void
-_mesa_init_multisample(GLcontext *ctx)
-{
- ctx->Multisample.Enabled = GL_FALSE;
- ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
- ctx->Multisample.SampleAlphaToOne = GL_FALSE;
- ctx->Multisample.SampleCoverage = GL_FALSE;
- ctx->Multisample.SampleCoverageValue = 1.0;
- ctx->Multisample.SampleCoverageInvert = GL_FALSE;
-}
-
-/*@}*/