/**
* \file buffers.c
- * General framebuffer-related functions, like glClear, glScissor, etc.
+ * glReadBuffer, DrawBuffer functions.
*/
#define BAD_MASK ~0u
-#if _HAVE_FULL_GL
-void GLAPIENTRY
-_mesa_ClearIndex( GLfloat c )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->Color.ClearIndex == (GLuint) c)
- return;
-
- FLUSH_VERTICES(ctx, _NEW_COLOR);
- ctx->Color.ClearIndex = (GLuint) c;
-
- if (!ctx->Visual.rgbMode && ctx->Driver.ClearIndex) {
- /* it's OK to call glClearIndex in RGBA mode but it should be a NOP */
- (*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex );
- }
-}
-#endif
-
-
-/**
- * Specify the clear values for the color buffers.
- *
- * \param red red color component.
- * \param green green color component.
- * \param blue blue color component.
- * \param alpha alpha component.
- *
- * \sa glClearColor().
- *
- * Clamps the parameters and updates gl_colorbuffer_attrib::ClearColor. On a
- * change, flushes the vertices and notifies the driver via the
- * dd_function_table::ClearColor callback.
- */
-void GLAPIENTRY
-_mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
-{
- GLfloat tmp[4];
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- tmp[0] = CLAMP(red, 0.0F, 1.0F);
- tmp[1] = CLAMP(green, 0.0F, 1.0F);
- tmp[2] = CLAMP(blue, 0.0F, 1.0F);
- tmp[3] = CLAMP(alpha, 0.0F, 1.0F);
-
- if (TEST_EQ_4V(tmp, ctx->Color.ClearColor))
- return; /* no change */
-
- FLUSH_VERTICES(ctx, _NEW_COLOR);
- COPY_4V(ctx->Color.ClearColor, tmp);
-
- if (ctx->Visual.rgbMode && ctx->Driver.ClearColor) {
- /* it's OK to call glClearColor in CI mode but it should be a NOP */
- (*ctx->Driver.ClearColor)(ctx, ctx->Color.ClearColor);
- }
-}
-
-
-/**
- * Clear buffers.
- *
- * \param mask bit-mask indicating the buffers to be cleared.
- *
- * Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState
- * is set then calls _mesa_update_state() to update gl_frame_buffer::_Xmin,
- * etc. If the rasterization mode is set to GL_RENDER then requests the driver
- * to clear the buffers, via the dd_function_table::Clear callback.
- */
-void GLAPIENTRY
-_mesa_Clear( GLbitfield mask )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- FLUSH_CURRENT(ctx, 0);
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glClear 0x%x\n", mask);
-
- if (mask & ~(GL_COLOR_BUFFER_BIT |
- GL_DEPTH_BUFFER_BIT |
- GL_STENCIL_BUFFER_BIT |
- GL_ACCUM_BUFFER_BIT)) {
- /* invalid bit set */
- _mesa_error( ctx, GL_INVALID_VALUE, "glClear(0x%x)", mask);
- return;
- }
-
- if (ctx->NewState) {
- _mesa_update_state( ctx ); /* update _Xmin, etc */
- }
-
- if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
- _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
- "glClear(incomplete framebuffer)");
- return;
- }
-
- if (ctx->DrawBuffer->Width == 0 || ctx->DrawBuffer->Height == 0 ||
- ctx->DrawBuffer->_Xmin >= ctx->DrawBuffer->_Xmax ||
- ctx->DrawBuffer->_Ymin >= ctx->DrawBuffer->_Ymax)
- return;
-
- if (ctx->RenderMode == GL_RENDER) {
- GLbitfield bufferMask;
-
- /* don't clear depth buffer if depth writing disabled */
- if (!ctx->Depth.Mask)
- mask &= ~GL_DEPTH_BUFFER_BIT;
-
- /* Build the bitmask to send to device driver's Clear function.
- * Note that the GL_COLOR_BUFFER_BIT flag will expand to 0, 1, 2 or 4
- * of the BUFFER_BIT_FRONT/BACK_LEFT/RIGHT flags, or one of the
- * BUFFER_BIT_COLORn flags.
- */
- bufferMask = 0;
- if (mask & GL_COLOR_BUFFER_BIT) {
- GLuint i;
- for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
- bufferMask |= (1 << ctx->DrawBuffer->_ColorDrawBufferIndexes[i]);
- }
- }
-
- if ((mask & GL_DEPTH_BUFFER_BIT)
- && ctx->DrawBuffer->Visual.haveDepthBuffer) {
- bufferMask |= BUFFER_BIT_DEPTH;
- }
-
- if ((mask & GL_STENCIL_BUFFER_BIT)
- && ctx->DrawBuffer->Visual.haveStencilBuffer) {
- bufferMask |= BUFFER_BIT_STENCIL;
- }
-
- if ((mask & GL_ACCUM_BUFFER_BIT)
- && ctx->DrawBuffer->Visual.haveAccumBuffer) {
- bufferMask |= BUFFER_BIT_ACCUM;
- }
-
- ASSERT(ctx->Driver.Clear);
- ctx->Driver.Clear(ctx, bufferMask);
- }
-}
-
-
-
/**
* Return bitmask of BUFFER_BIT_* flags indicating which color buffers are
* available to the rendering context (for drawing or reading).
destMask = draw_buffer_enum_to_bitmask(buffer);
if (destMask == BAD_MASK) {
/* totally bogus buffer */
- _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(buffer)");
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(buffer=0x%x)", buffer);
return;
}
destMask &= supportedMask;
if (destMask == 0x0) {
/* none of the named color buffers exist! */
- _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffer(buffer)");
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawBuffer(buffer=0x%x)", buffer);
return;
}
}
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- if (!ctx->Extensions.ARB_draw_buffers) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB");
- return;
- }
if (n < 1 || n > (GLsizei) ctx->Const.MaxDrawBuffers) {
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawBuffersARB(n)");
return;
}
}
- ctx->NewState |= _NEW_COLOR;
+ ctx->NewState |= _NEW_BUFFERS;
}
/* OK, all error checking has been completed now */
_mesa_readbuffer(ctx, buffer, srcBuffer);
+ ctx->NewState |= _NEW_BUFFERS;
/*
* Call device driver function.
if (ctx->Driver.ReadBuffer)
(*ctx->Driver.ReadBuffer)(ctx, buffer);
}
-
-
-#if _HAVE_FULL_GL
-
-/**
- * XXX THIS IS OBSOLETE - drivers should take care of detecting window
- * size changes and act accordingly, likely calling _mesa_resize_framebuffer().
- *
- * 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 _mesa_resizebuffers( GLcontext *ctx )
-{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glResizeBuffersMESA\n");
-
- if (!ctx->Driver.GetBufferSize) {
- return;
- }
-
- 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 THIS IS OBSOLETE
- */
-void GLAPIENTRY
-_mesa_ResizeBuffersMESA( void )
-{
- GET_CURRENT_CONTEXT(ctx);
-
- if (ctx->Extensions.MESA_resize_buffers)
- _mesa_resizebuffers( ctx );
-}
-
-
-/*
- * 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_TRUE;
- 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;
-}
-
-/*@}*/
projects / mesa.git / blobdiff