-/* $Id: texstore.c,v 1.26 2001/05/22 21:49:03 brianp Exp $ */
+/* $Id: texstore.c,v 1.27 2001/05/24 14:47:56 brianp Exp $ */
/*
* Mesa 3-D graphics library
texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
internalFormat, format, type);
assert(texImage->TexFormat);
+ texImage->FetchTexel = texImage->TexFormat->FetchTexel1D;
texelBytes = texImage->TexFormat->TexelBytes;
texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
internalFormat, format, type);
assert(texImage->TexFormat);
+ texImage->FetchTexel = texImage->TexFormat->FetchTexel3D;
texelBytes = texImage->TexFormat->TexelBytes;
/* We always pass.
* The core Mesa code will have already tested the image size, etc.
- * Drivers may have more stringent texture limits to enforce and will
+ * If a driver has more stringent texture limits to enforce it will
* have to override this function.
*/
/* choose the texture format */
/*
* Average together two rows of a source image to produce a single new
* row in the dest image. It's legal for the two source rows to point
- * to the same data. The source rows are to be twice as long as the
- * dest row.
+ * to the same data. The source width must be equal to either the
+ * dest width or two times the dest width.
*/
static void
-do_row(const struct gl_texture_format *format, GLint dstWidth,
- const GLvoid *srcRowA, const GLvoid *srcRowB, GLvoid *dstRow)
+do_row(const struct gl_texture_format *format, GLint srcWidth,
+ const GLvoid *srcRowA, const GLvoid *srcRowB,
+ GLint dstWidth, GLvoid *dstRow)
{
+ const GLuint k0 = (srcWidth == dstWidth) ? 0 : 1;
+ const GLuint colStride = (srcWidth == dstWidth) ? 1 : 2;
+
+ assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
+
switch (format->MesaFormat) {
case MESA_FORMAT_RGBA:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLchan (*rowA)[4] = (const GLchan (*)[4]) srcRowA;
const GLchan (*rowB)[4] = (const GLchan (*)[4]) srcRowB;
GLchan (*dst)[4] = (GLchan (*)[4]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
- dst[i][2] = (rowA[j][2] + rowA[j+1][2] +
- rowB[j][2] + rowB[j+1][2]) >> 2;
- dst[i][3] = (rowA[j][3] + rowA[j+1][3] +
- rowB[j][3] + rowB[j+1][3]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) >> 2;
+ dst[i][3] = (rowA[j][3] + rowA[k][3] +
+ rowB[j][3] + rowB[k][3]) >> 2;
}
}
return;
case MESA_FORMAT_RGB:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLchan (*rowA)[3] = (const GLchan (*)[3]) srcRowA;
const GLchan (*rowB)[3] = (const GLchan (*)[3]) srcRowB;
GLchan (*dst)[3] = (GLchan (*)[3]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
- dst[i][2] = (rowA[j][2] + rowA[j+1][2] +
- rowB[j][2] + rowB[j+1][2]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) >> 2;
}
}
return;
case MESA_FORMAT_INTENSITY:
case MESA_FORMAT_COLOR_INDEX:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLchan *rowA = (const GLchan *) srcRowA;
const GLchan *rowB = (const GLchan *) srcRowB;
GLchan *dst = (GLchan *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i] = (rowA[j] + rowA[j+1] + rowB[j] + rowB[j+1]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) >> 2;
}
}
return;
case MESA_FORMAT_LUMINANCE_ALPHA:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLchan (*rowA)[2] = (const GLchan (*)[2]) srcRowA;
const GLchan (*rowB)[2] = (const GLchan (*)[2]) srcRowB;
GLchan (*dst)[2] = (GLchan (*)[2]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
}
}
return;
case MESA_FORMAT_DEPTH_COMPONENT:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLfloat *rowA = (const GLfloat *) srcRowA;
const GLfloat *rowB = (const GLfloat *) srcRowB;
GLfloat *dst = (GLfloat *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i] = (rowA[j] + rowA[j+1] + rowB[j] + rowB[j+1]) * 0.25F;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) * 0.25F;
}
}
return;
case MESA_FORMAT_RGBA8888:
case MESA_FORMAT_ARGB8888:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLubyte (*rowA)[4] = (const GLubyte (*)[4]) srcRowA;
const GLubyte (*rowB)[4] = (const GLubyte (*)[4]) srcRowB;
GLubyte (*dst)[4] = (GLubyte (*)[4]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
- dst[i][2] = (rowA[j][2] + rowA[j+1][2] +
- rowB[j][2] + rowB[j+1][2]) >> 2;
- dst[i][3] = (rowA[j][3] + rowA[j+1][3] +
- rowB[j][3] + rowB[j+1][3]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) >> 2;
+ dst[i][3] = (rowA[j][3] + rowA[k][3] +
+ rowB[j][3] + rowB[k][3]) >> 2;
}
}
return;
case MESA_FORMAT_RGB888:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLubyte (*rowA)[3] = (const GLubyte (*)[3]) srcRowA;
const GLubyte (*rowB)[3] = (const GLubyte (*)[3]) srcRowB;
GLubyte (*dst)[3] = (GLubyte (*)[3]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
- dst[i][2] = (rowA[j][2] + rowA[j+1][2] +
- rowB[j][2] + rowB[j+1][2]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) >> 2;
}
}
return;
case MESA_FORMAT_RGB565:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLushort *rowA = (const GLushort *) srcRowA;
const GLushort *rowB = (const GLushort *) srcRowB;
GLushort *dst = (GLushort *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- const GLint rowAr0 = rowA[j] & 0x1f;
- const GLint rowAr1 = rowA[j+1] & 0x1f;
- const GLint rowBr0 = rowB[j] & 0x1f;
- const GLint rowBr1 = rowB[j+1] & 0x1f;
- const GLint rowAg0 = (rowA[j] >> 5) & 0x3f;
- const GLint rowAg1 = (rowA[j+1] >> 5) & 0x3f;
- const GLint rowBg0 = (rowB[j] >> 5) & 0x3f;
- const GLint rowBg1 = (rowB[j+1] >> 5) & 0x3f;
- const GLint rowAb0 = (rowA[j] >> 11) & 0x1f;
- const GLint rowAb1 = (rowA[j+1] >> 11) & 0x1f;
- const GLint rowBb0 = (rowB[j] >> 11) & 0x1f;
- const GLint rowBb1 = (rowB[j+1] >> 11) & 0x1f;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x1f;
+ const GLint rowAr1 = rowA[k] & 0x1f;
+ const GLint rowBr0 = rowB[j] & 0x1f;
+ const GLint rowBr1 = rowB[k] & 0x1f;
+ const GLint rowAg0 = (rowA[j] >> 5) & 0x3f;
+ const GLint rowAg1 = (rowA[k] >> 5) & 0x3f;
+ const GLint rowBg0 = (rowB[j] >> 5) & 0x3f;
+ const GLint rowBg1 = (rowB[k] >> 5) & 0x3f;
+ const GLint rowAb0 = (rowA[j] >> 11) & 0x1f;
+ const GLint rowAb1 = (rowA[k] >> 11) & 0x1f;
+ const GLint rowBb0 = (rowB[j] >> 11) & 0x1f;
+ const GLint rowBb1 = (rowB[k] >> 11) & 0x1f;
const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
return;
case MESA_FORMAT_ARGB4444:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLushort *rowA = (const GLushort *) srcRowA;
const GLushort *rowB = (const GLushort *) srcRowB;
GLushort *dst = (GLushort *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- const GLint rowAr0 = rowA[j] & 0xf;
- const GLint rowAr1 = rowA[j+1] & 0xf;
- const GLint rowBr0 = rowB[j] & 0xf;
- const GLint rowBr1 = rowB[j+1] & 0xf;
- const GLint rowAg0 = (rowA[j] >> 4) & 0xf;
- const GLint rowAg1 = (rowA[j+1] >> 4) & 0xf;
- const GLint rowBg0 = (rowB[j] >> 4) & 0xf;
- const GLint rowBg1 = (rowB[j+1] >> 4) & 0xf;
- const GLint rowAb0 = (rowA[j] >> 8) & 0xf;
- const GLint rowAb1 = (rowA[j+1] >> 8) & 0xf;
- const GLint rowBb0 = (rowB[j] >> 8) & 0xf;
- const GLint rowBb1 = (rowB[j+1] >> 8) & 0xf;
- const GLint rowAa0 = (rowA[j] >> 12) & 0xf;
- const GLint rowAa1 = (rowA[j+1] >> 12) & 0xf;
- const GLint rowBa0 = (rowB[j] >> 12) & 0xf;
- const GLint rowBa1 = (rowB[j+1] >> 12) & 0xf;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0xf;
+ const GLint rowAr1 = rowA[k] & 0xf;
+ const GLint rowBr0 = rowB[j] & 0xf;
+ const GLint rowBr1 = rowB[k] & 0xf;
+ const GLint rowAg0 = (rowA[j] >> 4) & 0xf;
+ const GLint rowAg1 = (rowA[k] >> 4) & 0xf;
+ const GLint rowBg0 = (rowB[j] >> 4) & 0xf;
+ const GLint rowBg1 = (rowB[k] >> 4) & 0xf;
+ const GLint rowAb0 = (rowA[j] >> 8) & 0xf;
+ const GLint rowAb1 = (rowA[k] >> 8) & 0xf;
+ const GLint rowBb0 = (rowB[j] >> 8) & 0xf;
+ const GLint rowBb1 = (rowB[k] >> 8) & 0xf;
+ const GLint rowAa0 = (rowA[j] >> 12) & 0xf;
+ const GLint rowAa1 = (rowA[k] >> 12) & 0xf;
+ const GLint rowBa0 = (rowB[j] >> 12) & 0xf;
+ const GLint rowBa1 = (rowB[k] >> 12) & 0xf;
const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
return;
case MESA_FORMAT_ARGB1555:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLushort *rowA = (const GLushort *) srcRowA;
const GLushort *rowB = (const GLushort *) srcRowB;
GLushort *dst = (GLushort *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- const GLint rowAr0 = rowA[j] & 0x1f;
- const GLint rowAr1 = rowA[j+1] & 0x1f;
- const GLint rowBr0 = rowB[j] & 0x1f;
- const GLint rowBr1 = rowB[j+1] & 0xf;
- const GLint rowAg0 = (rowA[j] >> 5) & 0x1f;
- const GLint rowAg1 = (rowA[j+1] >> 5) & 0x1f;
- const GLint rowBg0 = (rowB[j] >> 5) & 0x1f;
- const GLint rowBg1 = (rowB[j+1] >> 5) & 0x1f;
- const GLint rowAb0 = (rowA[j] >> 10) & 0x1f;
- const GLint rowAb1 = (rowA[j+1] >> 10) & 0x1f;
- const GLint rowBb0 = (rowB[j] >> 10) & 0x1f;
- const GLint rowBb1 = (rowB[j+1] >> 10) & 0x1f;
- const GLint rowAa0 = (rowA[j] >> 15) & 0x1;
- const GLint rowAa1 = (rowA[j+1] >> 15) & 0x1;
- const GLint rowBa0 = (rowB[j] >> 15) & 0x1;
- const GLint rowBa1 = (rowB[j+1] >> 15) & 0x1;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x1f;
+ const GLint rowAr1 = rowA[k] & 0x1f;
+ const GLint rowBr0 = rowB[j] & 0x1f;
+ const GLint rowBr1 = rowB[k] & 0xf;
+ const GLint rowAg0 = (rowA[j] >> 5) & 0x1f;
+ const GLint rowAg1 = (rowA[k] >> 5) & 0x1f;
+ const GLint rowBg0 = (rowB[j] >> 5) & 0x1f;
+ const GLint rowBg1 = (rowB[k] >> 5) & 0x1f;
+ const GLint rowAb0 = (rowA[j] >> 10) & 0x1f;
+ const GLint rowAb1 = (rowA[k] >> 10) & 0x1f;
+ const GLint rowBb0 = (rowB[j] >> 10) & 0x1f;
+ const GLint rowBb1 = (rowB[k] >> 10) & 0x1f;
+ const GLint rowAa0 = (rowA[j] >> 15) & 0x1;
+ const GLint rowAa1 = (rowA[k] >> 15) & 0x1;
+ const GLint rowBa0 = (rowB[j] >> 15) & 0x1;
+ const GLint rowBa1 = (rowB[k] >> 15) & 0x1;
const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
return;
case MESA_FORMAT_AL88:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLubyte (*rowA)[2] = (const GLubyte (*)[2]) srcRowA;
const GLubyte (*rowB)[2] = (const GLubyte (*)[2]) srcRowB;
GLubyte (*dst)[2] = (GLubyte (*)[2]) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i][0] = (rowA[j][0] + rowA[j+1][0] +
- rowB[j][0] + rowB[j+1][0]) >> 2;
- dst[i][1] = (rowA[j][1] + rowA[j+1][1] +
- rowB[j][1] + rowB[j+1][1]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
}
}
return;
case MESA_FORMAT_RGB332:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLubyte *rowA = (const GLubyte *) srcRowA;
const GLubyte *rowB = (const GLubyte *) srcRowB;
GLubyte *dst = (GLubyte *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- const GLint rowAr0 = rowA[j] & 0x3;
- const GLint rowAr1 = rowA[j+1] & 0x3;
- const GLint rowBr0 = rowB[j] & 0x3;
- const GLint rowBr1 = rowB[j+1] & 0x3;
- const GLint rowAg0 = (rowA[j] >> 2) & 0x7;
- const GLint rowAg1 = (rowA[j+1] >> 2) & 0x7;
- const GLint rowBg0 = (rowB[j] >> 2) & 0x7;
- const GLint rowBg1 = (rowB[j+1] >> 2) & 0x7;
- const GLint rowAb0 = (rowA[j] >> 5) & 0x7;
- const GLint rowAb1 = (rowA[j+1] >> 5) & 0x7;
- const GLint rowBb0 = (rowB[j] >> 5) & 0x7;
- const GLint rowBb1 = (rowB[j+1] >> 5) & 0x7;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x3;
+ const GLint rowAr1 = rowA[k] & 0x3;
+ const GLint rowBr0 = rowB[j] & 0x3;
+ const GLint rowBr1 = rowB[k] & 0x3;
+ const GLint rowAg0 = (rowA[j] >> 2) & 0x7;
+ const GLint rowAg1 = (rowA[k] >> 2) & 0x7;
+ const GLint rowBg0 = (rowB[j] >> 2) & 0x7;
+ const GLint rowBg1 = (rowB[k] >> 2) & 0x7;
+ const GLint rowAb0 = (rowA[j] >> 5) & 0x7;
+ const GLint rowAb1 = (rowA[k] >> 5) & 0x7;
+ const GLint rowBb0 = (rowB[j] >> 5) & 0x7;
+ const GLint rowBb1 = (rowB[k] >> 5) & 0x7;
const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
case MESA_FORMAT_I8:
case MESA_FORMAT_CI8:
{
- GLuint i, j;
+ GLuint i, j, k;
const GLubyte *rowA = (const GLubyte *) srcRowA;
const GLubyte *rowB = (const GLubyte *) srcRowB;
GLubyte *dst = (GLubyte *) dstRow;
- for (i = j = 0; i < dstWidth; i++, j+=2) {
- dst[i] = (rowA[j] + rowA[j+1] + rowB[j] + rowB[j+1]) >> 2;
+ for (i = j = 0, k = k0; i < dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) >> 2;
}
}
return;
}
-
+/*
+ * These functions generate a 1/2-size mipmap image from a source image.
+ * Texture borders are handled by copying or averaging the source image's
+ * border texels, depending on the scale-down factor.
+ */
static void
make_1d_mipmap(const struct gl_texture_format *format, GLint border,
dst = dstPtr + border * bpt;
/* we just duplicate the input row, kind of hack, saves code */
- do_row(format, dstWidth - 2 * border, src, src, dst);
+ do_row(format, srcWidth - 2 * border, src, src,
+ dstWidth - 2 * border, dst);
if (border) {
/* copy left-most pixel from source */
GLint dstWidth, GLint dstHeight, GLubyte *dstPtr)
{
const GLint bpt = format->TexelBytes;
+ const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */
+ const GLint dstWidthNB = dstWidth - 2 * border;
+ const GLint dstHeightNB = dstHeight - 2 * border;
const GLint srcRowStride = bpt * srcWidth;
const GLint dstRowStride = bpt * dstWidth;
const GLubyte *srcA, *srcB;
GLubyte *dst;
- GLint row;
+ GLint row, colStride;
+
+ colStride = (srcWidth == dstWidth) ? 1 : 2;
/* Compute src and dst pointers, skipping any border */
srcA = srcPtr + border * ((srcWidth + 1) * bpt);
srcB = srcA;
dst = dstPtr + border * ((dstWidth + 1) * bpt);
- for (row = 0; row < dstHeight - 2 * border; row++) {
- do_row(format, dstWidth - 2 * border, srcA, srcB, dst);
+ for (row = 0; row < dstHeightNB; row++) {
+ do_row(format, srcWidthNB, srcA, srcB,
+ dstWidthNB, dst);
srcA += 2 * srcRowStride;
srcB += 2 * srcRowStride;
dst += dstRowStride;
MEMCPY(dstPtr + (dstWidth * dstHeight - 1) * bpt,
srcPtr + (srcWidth * srcHeight - 1) * bpt, bpt);
/* lower border */
- do_row(format, dstWidth - 2 * border,
- srcPtr + bpt, srcPtr + bpt, dstPtr + bpt);
+ do_row(format, srcWidthNB,
+ srcPtr + bpt,
+ srcPtr + bpt,
+ dstWidthNB, dstPtr + bpt);
/* upper border */
- do_row(format, dstWidth - 2 * border,
+ do_row(format, srcWidthNB,
srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt,
srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt,
+ dstWidthNB,
dstPtr + (dstWidth * (dstHeight - 1) + 1) * bpt);
/* left and right borders */
- for (row = 0; row < dstHeight - 2 * border; row += 2) {
- GLubyte tempPixel[32];
- GLint srcOffset;
- srcOffset = (srcWidth * (row * 2 + 1)) * bpt;
- MEMCPY(tempPixel, srcPtr + srcOffset, bpt);
- srcOffset = (srcWidth * (row * 2 + 2)) * bpt;
- MEMCPY(tempPixel + bpt, srcPtr + srcOffset, bpt);
- do_row(format, 1, tempPixel, tempPixel,
- dstPtr + (dstWidth * row + 1) * bpt);
- srcOffset = (srcWidth * (row * 2 + 1) + srcWidth - 1) * bpt;
- MEMCPY(tempPixel, srcPtr + srcOffset, bpt);
- srcOffset = (srcWidth * (row * 2 + 2) + srcWidth - 1) * bpt;
- MEMCPY(tempPixel, srcPtr + srcOffset, bpt);
- do_row(format, 1, tempPixel, tempPixel,
- dstPtr + (dstWidth * row + 1 + dstWidth - 1) * bpt);
+ if (srcHeight == dstHeight) {
+ /* copy border pixel from src to dst */
+ for (row = 1; row < srcHeight; row++) {
+ MEMCPY(dstPtr + dstWidth * row * bpt,
+ srcPtr + srcWidth * row * bpt, bpt);
+ MEMCPY(dstPtr + (dstWidth * row + dstWidth - 1) * bpt,
+ srcPtr + (srcWidth * row + srcWidth - 1) * bpt, bpt);
+ }
+ }
+ else {
+ /* average two src pixels each dest pixel */
+ for (row = 0; row < dstHeightNB; row += 2) {
+ do_row(format, 1,
+ srcPtr + (srcWidth * (row * 2 + 1)) * bpt,
+ srcPtr + (srcWidth * (row * 2 + 2)) * bpt,
+ 1, dstPtr + (dstWidth * row + 1) * bpt);
+ do_row(format, 1,
+ srcPtr + (srcWidth * (row * 2 + 1) + srcWidth - 1) * bpt,
+ srcPtr + (srcWidth * (row * 2 + 2) + srcWidth - 1) * bpt,
+ 1, dstPtr + (dstWidth * row + 1 + dstWidth - 1) * bpt);
+ }
}
}
}
GLint dstWidth, GLint dstHeight, GLint dstDepth,
GLubyte *dstPtr)
{
- GLvoid *tmpRowA = MALLOC(dstWidth * format->TexelBytes);
- GLvoid *tmpRowB = MALLOC(dstWidth * format->TexelBytes);
- const GLubyte *srcA, *srcB, *srcC, *srcD;
+ const GLint bpt = format->TexelBytes;
+ const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */
+ const GLint srcDepthNB = srcDepth - 2 * border;
+ const GLint dstWidthNB = dstWidth - 2 * border;
+ const GLint dstHeightNB = dstHeight - 2 * border;
+ const GLint dstDepthNB = dstDepth - 2 * border;
+ GLvoid *tmpRowA, *tmpRowB;
GLint img, row;
+ GLint bytesPerSrcImage, bytesPerDstImage;
+ GLint bytesPerSrcRow, bytesPerDstRow;
+ GLint srcImageOffset, srcRowOffset;
- if (!tmpRowA || !tmpRowB) {
- if (tmpRowA)
- FREE(tmpRowA);
+ /* Need two temporary row buffers */
+ tmpRowA = MALLOC(srcWidth * bpt);
+ if (!tmpRowA)
+ return;
+ tmpRowB = MALLOC(srcWidth * bpt);
+ if (!tmpRowB) {
+ FREE(tmpRowA);
return;
}
- /*
- * XXX lots of work to do here yet
- */
+ bytesPerSrcImage = srcWidth * srcHeight * bpt;
+ bytesPerDstImage = dstWidth * dstHeight * bpt;
+
+ bytesPerSrcRow = srcWidth * bpt;
+ bytesPerDstRow = dstWidth * bpt;
- for (img = 0; img < dstDepth - 2 * border; img++) {
+ /* Offset between adjacent src images to be averaged together */
+ srcImageOffset = (srcDepth == dstDepth) ? 0 : bytesPerSrcImage;
- for (row = 0; row < dstHeight - 2 * border; row++) {
- do_row(format, dstWidth - 2 * border, srcA, srcB, tmpRowA);
- do_row(format, dstWidth - 2 * border, srcC, srcD, tmpRowB);
+ /* Offset between adjacent src rows to be averaged together */
+ srcRowOffset = (srcHeight == dstHeight) ? 0 : srcWidth * bpt;
+ /*
+ * Need to average together up to 8 src pixels for each dest pixel.
+ * Break that down into 3 operations:
+ * 1. take two rows from source image and average them together.
+ * 2. take two rows from next source image and average them together.
+ * 3. take the two averaged rows and average them for the final dst row.
+ */
+ /*
+ printf("mip3d %d x %d x %d -> %d x %d x %d\n",
+ srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
+ */
+
+ for (img = 0; img < dstDepthNB; img++) {
+ /* first source image pointer, skipping border */
+ const GLubyte *imgSrcA = srcPtr
+ + (bytesPerSrcImage + bytesPerSrcRow + border) * bpt * border
+ + img * (bytesPerSrcImage + srcImageOffset);
+ /* second source image pointer, skipping border */
+ const GLubyte *imgSrcB = imgSrcA + srcImageOffset;
+ /* address of the dest image, skipping border */
+ GLubyte *imgDst = dstPtr
+ + (bytesPerDstImage + bytesPerDstRow + border) * bpt * border
+ + img * bytesPerDstImage;
+
+ /* setup the four source row pointers and the dest row pointer */
+ const GLubyte *srcImgARowA = imgSrcA;
+ const GLubyte *srcImgARowB = imgSrcA + srcRowOffset;
+ const GLubyte *srcImgBRowA = imgSrcB;
+ const GLubyte *srcImgBRowB = imgSrcB + srcRowOffset;
+ GLubyte *dstImgRow = imgDst;
+
+ for (row = 0; row < dstHeightNB; row++) {
+ /* Average together two rows from first src image */
+ do_row(format, srcWidthNB, srcImgARowA, srcImgARowB,
+ srcWidthNB, tmpRowA);
+ /* Average together two rows from second src image */
+ do_row(format, srcWidthNB, srcImgBRowA, srcImgBRowB,
+ srcWidthNB, tmpRowB);
+ /* Average together the temp rows to make the final row */
+ do_row(format, srcWidthNB, tmpRowA, tmpRowB,
+ dstWidthNB, dstImgRow);
+ /* advance to next rows */
+ srcImgARowA += bytesPerSrcRow + srcRowOffset;
+ srcImgARowB += bytesPerSrcRow + srcRowOffset;
+ srcImgBRowA += bytesPerSrcRow + srcRowOffset;
+ srcImgBRowB += bytesPerSrcRow + srcRowOffset;
+ dstImgRow += bytesPerDstRow;
}
}
FREE(tmpRowA);
FREE(tmpRowB);
+
+ /* Luckily we can leverage the make_2d_mipmap() function here! */
+ if (border > 0) {
+ /* do front border image */
+ make_2d_mipmap(format, 1, srcWidth, srcHeight, srcPtr,
+ dstWidth, dstHeight, dstPtr);
+ /* do back border image */
+ make_2d_mipmap(format, 1, srcWidth, srcHeight,
+ srcPtr + bytesPerSrcImage * (srcDepth - 1),
+ dstWidth, dstHeight,
+ dstPtr + bytesPerDstImage * (dstDepth - 1));
+ /* do four remaining border edges that span the image slices */
+ if (srcDepth == dstDepth) {
+ /* just copy border pixels from src to dst */
+ for (img = 0; img < dstDepthNB; img++) {
+ const GLubyte *src;
+ GLubyte *dst;
+
+ /* do border along [img][row=0][col=0] */
+ src = srcPtr + (img + 1) * bytesPerSrcImage;
+ dst = dstPtr + (img + 1) * bytesPerDstImage;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=dstHeight-1][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcHeight - 1) * bytesPerSrcRow;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstHeight - 1) * bytesPerDstRow;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=0][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcWidth - 1) * bpt;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstWidth - 1) * bpt;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (bytesPerSrcImage - bpt);
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (bytesPerDstImage - bpt);
+ MEMCPY(dst, src, bpt);
+ }
+ }
+ else {
+ /* average border pixels from adjacent src image pairs */
+ ASSERT(srcDepthNB == 2 * dstDepthNB);
+ for (img = 0; img < dstDepthNB; img++) {
+ const GLubyte *src;
+ GLubyte *dst;
+
+ /* do border along [img][row=0][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage;
+ dst = dstPtr + (img + 1) * bytesPerDstImage;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=dstHeight-1][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcHeight - 1) * bytesPerSrcRow;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstHeight - 1) * bytesPerDstRow;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=0][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcWidth - 1) * bpt;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstWidth - 1) * bpt;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (bytesPerSrcImage - bpt);
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (bytesPerDstImage - bpt);
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+ }
+ }
+ }
}
}
for (level = texObj->BaseLevel; level < texObj->MaxLevel
- && level < ctx->Const.MaxTextureLevels; level++) {
- /* generate level+1 from level */
+ && level < ctx->Const.MaxTextureLevels - 1; level++) {
+ /* generate image[level+1] from image[level] */
const struct gl_texture_image *srcImage;
struct gl_texture_image *dstImage;
GLint srcWidth, srcHeight, srcDepth;
dstImage->DriverData = NULL;
dstImage->TexFormat = srcImage->TexFormat;
dstImage->FetchTexel = srcImage->FetchTexel;
+ ASSERT(dstImage->TexFormat);
+ ASSERT(dstImage->FetchTexel);
ASSERT(dstWidth * dstHeight * dstDepth * bytesPerTexel > 0);
projects / mesa.git / commitdiff