progs/gallium/python/samples/tri.py

   1 #!/usr/bin/env python
   2 ##########################################################################
   3 #
   4 # Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   5 # All Rights Reserved.
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a
   8 # copy of this software and associated documentation files (the
   9 # "Software"), to deal in the Software without restriction, including
  10 # without limitation the rights to use, copy, modify, merge, publish,
  11 # distribute, sub license, and/or sell copies of the Software, and to
  12 # permit persons to whom the Software is furnished to do so, subject to
  13 # the following conditions:
  14 #
  15 # The above copyright notice and this permission notice (including the
  16 # next paragraph) shall be included in all copies or substantial portions
  17 # of the Software.
  18 #
  19 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22 # IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 #
  27 ##########################################################################
  28
  29
  30 from gallium import *
  31
  32
  33 def make_image(ctx, surface):
  34     data = ctx.surface_read_rgba8(surface, 0, 0, surface.width, surface.height)
  35
  36     import Image
  37     outimage = Image.fromstring('RGBA', (surface.width, surface.height), data, "raw", 'RGBA', 0, 1)
  38     return outimage
  39
  40 def save_image(ctx, surface, filename):
  41     outimage = make_image(ctx, surface)
  42     outimage.save(filename, "PNG")
  43
  44 def show_image(ctx, surface):
  45     outimage = make_image(ctx, surface)
  46
  47     import Tkinter as tk
  48     from PIL import Image, ImageTk
  49     root = tk.Tk()
  50
  51     root.title('background image')
  52
  53     image1 = ImageTk.PhotoImage(outimage)
  54     w = image1.width()
  55     h = image1.height()
  56     x = 100
  57     y = 100
  58     root.geometry("%dx%d+%d+%d" % (w, h, x, y))
  59     panel1 = tk.Label(root, image=image1)
  60     panel1.pack(side='top', fill='both', expand='yes')
  61     panel1.image = image1
  62     root.mainloop()
  63
  64
  65 def test(dev):
  66     ctx = dev.context_create()
  67
  68     width = 255
  69     height = 255
  70     minz = 0.0
  71     maxz = 1.0
  72
  73     # disabled blending/masking
  74     blend = Blend()
  75     blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE
  76     blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE
  77     blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO
  78     blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO
  79     blend.rt[0].colormask = PIPE_MASK_RGBA
  80     ctx.set_blend(blend)
  81
  82     # depth/stencil/alpha
  83     depth_stencil_alpha = DepthStencilAlpha()
  84     depth_stencil_alpha.depth.enabled = 1
  85     depth_stencil_alpha.depth.writemask = 1
  86     depth_stencil_alpha.depth.func = PIPE_FUNC_LESS
  87     ctx.set_depth_stencil_alpha(depth_stencil_alpha)
  88
  89     # rasterizer
  90     rasterizer = Rasterizer()
  91     rasterizer.front_winding = PIPE_WINDING_CW
  92     rasterizer.cull_mode = PIPE_WINDING_NONE
  93     rasterizer.scissor = 1
  94     ctx.set_rasterizer(rasterizer)
  95
  96     # viewport
  97     viewport = Viewport()
  98     scale = FloatArray(4)
  99     scale[0] = width / 2.0
 100     scale[1] = -height / 2.0
 101     scale[2] = (maxz - minz) / 2.0
 102     scale[3] = 1.0
 103     viewport.scale = scale
 104     translate = FloatArray(4)
 105     translate[0] = width / 2.0
 106     translate[1] = height / 2.0
 107     translate[2] = (maxz - minz) / 2.0
 108     translate[3] = 0.0
 109     viewport.translate = translate
 110     ctx.set_viewport(viewport)
 111
 112     # samplers
 113     sampler = Sampler()
 114     sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 115     sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 116     sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 117     sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE
 118     sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST
 119     sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST
 120     sampler.normalized_coords = 1
 121     ctx.set_fragment_sampler(0, sampler)
 122
 123     # scissor
 124     scissor = Scissor()
 125     scissor.minx = 0
 126     scissor.miny = 0
 127     scissor.maxx = width
 128     scissor.maxy = height
 129     ctx.set_scissor(scissor)
 130
 131     # clip
 132     clip = Clip()
 133     clip.nr = 0
 134     ctx.set_clip(clip)
 135
 136     # framebuffer
 137     cbuf = dev.resource_create(
 138         PIPE_FORMAT_B8G8R8X8_UNORM,
 139         width, height,
 140         bind=PIPE_BIND_RENDER_TARGET,
 141     ).get_surface()
 142     zbuf = dev.resource_create(
 143         PIPE_FORMAT_Z32_UNORM,
 144         width, height,
 145         bind=PIPE_BIND_DEPTH_STENCIL,
 146     ).get_surface()
 147     fb = Framebuffer()
 148     fb.width = width
 149     fb.height = height
 150     fb.nr_cbufs = 1
 151     fb.set_cbuf(0, cbuf)
 152     fb.set_zsbuf(zbuf)
 153     ctx.set_framebuffer(fb)
 154     rgba = FloatArray(4);
 155     rgba[0] = 0.0
 156     rgba[1] = 0.0
 157     rgba[2] = 0.0
 158     rgba[3] = 0.0
 159     ctx.clear(PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL, rgba, 1.0, 0xff)
 160
 161     # vertex shader
 162     vs = Shader('''
 163         VERT
 164         DCL IN[0], POSITION, CONSTANT
 165         DCL IN[1], COLOR, CONSTANT
 166         DCL OUT[0], POSITION, CONSTANT
 167         DCL OUT[1], COLOR, CONSTANT
 168         0:MOV OUT[0], IN[0]
 169         1:MOV OUT[1], IN[1]
 170         2:END
 171     ''')
 172     ctx.set_vertex_shader(vs)
 173
 174     # fragment shader
 175     fs = Shader('''
 176         FRAG
 177         DCL IN[0], COLOR, LINEAR
 178         DCL OUT[0], COLOR, CONSTANT
 179         0:MOV OUT[0], IN[0]
 180         1:END
 181     ''')
 182     ctx.set_fragment_shader(fs)
 183
 184     nverts = 3
 185     nattrs = 2
 186     verts = FloatArray(nverts * nattrs * 4)
 187
 188     verts[ 0] =   0.0 # x1
 189     verts[ 1] =   0.8 # y1
 190     verts[ 2] =   0.2 # z1
 191     verts[ 3] =   1.0 # w1
 192     verts[ 4] =   1.0 # r1
 193     verts[ 5] =   0.0 # g1
 194     verts[ 6] =   0.0 # b1
 195     verts[ 7] =   1.0 # a1
 196     verts[ 8] =  -0.8 # x2
 197     verts[ 9] =  -0.8 # y2
 198     verts[10] =   0.5 # z2
 199     verts[11] =   1.0 # w2
 200     verts[12] =   0.0 # r2
 201     verts[13] =   1.0 # g2
 202     verts[14] =   0.0 # b2
 203     verts[15] =   1.0 # a2
 204     verts[16] =   0.8 # x3
 205     verts[17] =  -0.8 # y3
 206     verts[18] =   0.8 # z3
 207     verts[19] =   1.0 # w3
 208     verts[20] =   0.0 # r3
 209     verts[21] =   0.0 # g3
 210     verts[22] =   1.0 # b3
 211     verts[23] =   1.0 # a3
 212
 213     ctx.draw_vertices(PIPE_PRIM_TRIANGLES,
 214                       nverts,
 215                       nattrs,
 216                       verts)
 217
 218     ctx.flush()
 219
 220     show_image(ctx, cbuf)
 221     show_image(ctx, zbuf)
 222     save_image(ctx, cbuf, 'cbuf.png')
 223     save_image(ctx, zbuf, 'zbuf.png')
 224
 225
 226
 227 def main():
 228     dev = Device()
 229     test(dev)
 230
 231
 232 if __name__ == '__main__':
 233     main()