#include "glheader.h"
#include "colormac.h"
#include "macros.h"
#include "imports.h"
#include "s_accum.h"
#include "s_alphabuf.h"
#include "s_context.h"
#include "s_depth.h"
#include "s_masking.h"
#include "s_stencil.h"
static void
clear_color_buffer_with_masking( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
if (ctx->Visual.rgbMode) {
GLchan clearColor[4];
GLint i;
CLAMPED_FLOAT_TO_CHAN(clearColor[RCOMP], ctx->Color.ClearColor[0]);
CLAMPED_FLOAT_TO_CHAN(clearColor[GCOMP], ctx->Color.ClearColor[1]);
CLAMPED_FLOAT_TO_CHAN(clearColor[BCOMP], ctx->Color.ClearColor[2]);
CLAMPED_FLOAT_TO_CHAN(clearColor[ACOMP], ctx->Color.ClearColor[3]);
for (i = 0; i < height; i++) {
GLchan rgba[MAX_WIDTH][4];
GLint j;
for (j = 0; j < width; j++) {
COPY_CHAN4(rgba[j], clearColor);
}
_mesa_mask_rgba_array( ctx, width, x, y + i, rgba );
(*swrast->Driver.WriteRGBASpan)( ctx, width, x, y + i,
(CONST GLchan (*)[4]) rgba, NULL );
}
}
else {
GLuint span[MAX_WIDTH];
GLubyte mask[MAX_WIDTH];
GLint i, j;
MEMSET( mask, 1, width );
for (i=0;i<height;i++) {
for (j=0;j<width;j++) {
span[j] = ctx->Color.ClearIndex;
}
_mesa_mask_index_array( ctx, width, x, y + i, span );
(*swrast->Driver.WriteCI32Span)( ctx, width, x, y + i, span, mask );
}
}
}
static void
clear_color_buffer(GLcontext *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
if (ctx->Visual.rgbMode) {
GLchan clearColor[4];
GLchan span[MAX_WIDTH][4];
GLint i;
CLAMPED_FLOAT_TO_CHAN(clearColor[RCOMP], ctx->Color.ClearColor[0]);
CLAMPED_FLOAT_TO_CHAN(clearColor[GCOMP], ctx->Color.ClearColor[1]);
CLAMPED_FLOAT_TO_CHAN(clearColor[BCOMP], ctx->Color.ClearColor[2]);
CLAMPED_FLOAT_TO_CHAN(clearColor[ACOMP], ctx->Color.ClearColor[3]);
ASSERT(*((GLuint *) &ctx->Color.ColorMask) == 0xffffffff);
for (i = 0; i < width; i++) {
COPY_CHAN4(span[i], clearColor);
}
for (i = 0; i < height; i++) {
(*swrast->Driver.WriteRGBASpan)( ctx, width, x, y + i,
(CONST GLchan (*)[4]) span, NULL );
}
}
else {
ASSERT((ctx->Color.IndexMask & ((1 << ctx->Visual.indexBits) - 1))
== (GLuint) ((1 << ctx->Visual.indexBits) - 1));
if (ctx->Visual.indexBits == 8) {
GLubyte span[MAX_WIDTH];
GLint i;
MEMSET(span, ctx->Color.ClearIndex, width);
for (i = 0; i < height; i++) {
(*swrast->Driver.WriteCI8Span)( ctx, width, x, y + i, span, NULL );
}
}
else {
GLuint span[MAX_WIDTH];
GLint i;
for (i = 0; i < width; i++) {
span[i] = ctx->Color.ClearIndex;
}
for (i = 0; i < height; i++) {
(*swrast->Driver.WriteCI32Span)( ctx, width, x, y + i, span, NULL );
}
}
}
}
static void
clear_color_buffers(GLcontext *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
GLuint bufferBit;
for (bufferBit = 1; bufferBit <= 8; bufferBit = bufferBit << 1) {
if (bufferBit & ctx->Color._DrawDestMask) {
(*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, bufferBit);
if (colorMask != 0xffffffff) {
clear_color_buffer_with_masking(ctx);
}
else {
clear_color_buffer(ctx);
}
}
}
_swrast_use_draw_buffer(ctx);
}
void
_swrast_Clear( GLcontext *ctx, GLbitfield mask,
GLboolean all,
GLint x, GLint y, GLint width, GLint height )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
#ifdef DEBUG
{
GLbitfield legalBits = DD_FRONT_LEFT_BIT |
DD_FRONT_RIGHT_BIT |
DD_BACK_LEFT_BIT |
DD_BACK_RIGHT_BIT |
DD_DEPTH_BIT |
DD_STENCIL_BIT |
DD_ACCUM_BIT;
assert((mask & (~legalBits)) == 0);
}
#endif
RENDER_START(swrast,ctx);
if (mask) {
if (mask & ctx->Color._DrawDestMask) clear_color_buffers(ctx);
if (mask & GL_DEPTH_BUFFER_BIT) _mesa_clear_depth_buffer(ctx);
if (mask & GL_ACCUM_BUFFER_BIT) _mesa_clear_accum_buffer(ctx);
if (mask & GL_STENCIL_BUFFER_BIT) _mesa_clear_stencil_buffer(ctx);
}
if ( (mask & GL_COLOR_BUFFER_BIT)
&& ctx->DrawBuffer->UseSoftwareAlphaBuffers
&& ctx->Color.ColorMask[ACOMP]) {
_mesa_clear_alpha_buffers( ctx );
}
RENDER_FINISH(swrast,ctx);
}
void
_swrast_alloc_buffers( GLframebuffer *buffer )
{
if (buffer->UseSoftwareDepthBuffer) {
_mesa_alloc_depth_buffer( buffer );
}
if (buffer->UseSoftwareStencilBuffer) {
_mesa_alloc_stencil_buffer( buffer );
}
if (buffer->UseSoftwareAccumBuffer) {
_mesa_alloc_accum_buffer( buffer );
}
if (buffer->UseSoftwareAlphaBuffers) {
_mesa_alloc_alpha_buffers( buffer );
}
}
void
_swrast_DrawBuffer( GLcontext *ctx, GLenum mode )
{
_swrast_use_draw_buffer(ctx);
}
void
_swrast_use_read_buffer( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
swrast->CurrentBuffer = ctx->Pixel._ReadSrcMask;
(*swrast->Driver.SetBuffer)( ctx, ctx->ReadBuffer, swrast->CurrentBuffer );
}
void
_swrast_use_draw_buffer( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (ctx->Color._DrawDestMask & FRONT_LEFT_BIT)
swrast->CurrentBuffer = FRONT_LEFT_BIT;
else if (ctx->Color._DrawDestMask & BACK_LEFT_BIT)
swrast->CurrentBuffer = BACK_LEFT_BIT;
else if (ctx->Color._DrawDestMask & FRONT_RIGHT_BIT)
swrast->CurrentBuffer = FRONT_RIGHT_BIT;
else if (ctx->Color._DrawDestMask & BACK_RIGHT_BIT)
swrast->CurrentBuffer = BACK_RIGHT_BIT;
else
swrast->CurrentBuffer = FRONT_LEFT_BIT;
(*swrast->Driver.SetBuffer)( ctx, ctx->DrawBuffer, swrast->CurrentBuffer );
}